139745856 has 28 divisors (see below), whose sum is σ = 369744752. Its totient is φ = 46581888.

The previous prime is 139745833. The next prime is 139745873. The reversal of 139745856 is 658547931.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363730 + ... + 364113.

Almost surely, 2^139745856 is an apocalyptic number.

139745856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

139745856 is an abundant number, since it is smaller than the sum of its proper divisors (229998896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139745856 is an equidigital number, since it uses as much as digits as its factorization.

139745856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727858 (or 727848 counting only the distinct ones).

The product of its digits is 907200, while the sum is 48.

The square root of 139745856 is about 11821.4151437127. The cubic root of 139745856 is about 518.9350195783.

The spelling of 139745856 in words is "one hundred thirty-nine million, seven hundred forty-five thousand, eight hundred fifty-six".