139718656 has 104 divisors (see below), whose sum is σ = 349133184. Its totient is φ = 54312960.

The previous prime is 139718633. The next prime is 139718659. The reversal of 139718656 is 656817931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139718659) 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, 315171 + ... + 315613.

Almost surely, 2^139718656 is an apocalyptic number.

139718656 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 139718656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174566592).

139718656 is an abundant number, since it is smaller than the sum of its proper divisors (209414528).

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

139718656 is an equidigital number, since it uses as much as digits as its factorization.

139718656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 463 counting only the distinct ones).

The product of its digits is 272160, while the sum is 46.

The square root of 139718656 is about 11820.2646332474. The cubic root of 139718656 is about 518.9013490548.

The spelling of 139718656 in words is "one hundred thirty-nine million, seven hundred eighteen thousand, six hundred fifty-six".