139328256 has 72 divisors (see below), whose sum is σ = 379529920. Its totient is φ = 45351936.

The previous prime is 139328251. The next prime is 139328263. The reversal of 139328256 is 652823931.

It is not an unprimeable number, because it can be changed into a prime (139328251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30915 + ... + 35133.

Almost surely, 2^139328256 is an apocalyptic number.

139328256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139328256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189764960).

139328256 is an abundant number, since it is smaller than the sum of its proper divisors (240201664).

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

139328256 is an equidigital number, since it uses as much as digits as its factorization.

139328256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4281 (or 4267 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The square root of 139328256 is about 11803.7390686172. The cubic root of 139328256 is about 518.4175958057.

The spelling of 139328256 in words is "one hundred thirty-nine million, three hundred twenty-eight thousand, two hundred fifty-six".