139890688 has 156 divisors (see below), whose sum is σ = 352966572. Its totient is φ = 55050240.

The previous prime is 139890683. The next prime is 139890689. The reversal of 139890688 is 886098931.

139890688 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 51380224 + 88510464 = 7168^2 + 9408^2 .

It is a super-2 number, since 2×139890688² = 39138809178226688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139890683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3411948 + ... + 3411988.

Almost surely, 2^139890688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139890688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176483286).

139890688 is an abundant number, since it is smaller than the sum of its proper divisors (213075884).

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

139890688 is an equidigital number, since it uses as much as digits as its factorization.

139890688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 139890688 is about 11827.5393890699. The cubic root of 139890688 is about 519.1142316834.

The spelling of 139890688 in words is "one hundred thirty-nine million, eight hundred ninety thousand, six hundred eighty-eight".