Integer Profile

643,640

2^3 × 5 × 16091

Prime factors, divisor sums, positional representations and sequence properties for 643,640. The prime factorization is 2^3 × 5 × 16091.

Number of positive divisors: 16. Showing the recorded part of the sequence: 216.

AbundantEvenComposite

Number bases

Decimal: 643640
Binary: 10011101001000111000 (20 bits)
Octal: 0o2351070
Hexadecimal: 0x9D238

Divisor catalog (16)

1245810204016,09132,18264,36480,455128,728160,910321,820643,640

Showing 16 of 16.

Collatz trajectory (216 steps)

Even: n → n/2; Odd: n → 3n + 1

643,640321,820160,91080,455241,366120,683362,050181,025543,076271,538135,769407,308203,654101,827305,482152,741458,224229,112114,55657,27828,63985,91842,959128,87864,439193,31896,659289,978144,989434,968217,484108,74254,371163,11481,557244,672122,33661,16830,58415,2927,6463,82311,4705,73517,2068,60325,81012,90538,71619,3589,67929,03814,51943,55821,77965,33832,66998,00849,00424,502

Showing 60 of 60.

Prime factorization

Factorization: 2^3 × 5 × 16091
Distinct prime factors: 3
Perfect square: No
Parity: Even

Arithmetic properties

Positive divisors: 16
Divisor sum: 1,448,280
Proper-divisor sum: 804,640
Digit sum: 23
Digital root: 5