138656070 has 64 divisors (see below), whose sum is σ = 422576640. Its totient is φ = 31692384.

The previous prime is 138656069. The next prime is 138656081. The reversal of 138656070 is 70656831.

138656070 is a `hidden beast` number, since 13 + 86 + 560 + 7 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34792 + ... + 38571.

It is an arithmetic number, because the mean of its divisors is an integer number (6602760).

Almost surely, 2^138656070 is an apocalyptic number.

138656070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138656070 is an abundant number, since it is smaller than the sum of its proper divisors (283920570).

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

138656070 is a wasteful number, since it uses less digits than its factorization.

138656070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73386 (or 73380 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 138656070 is about 11775.2312079211. The cubic root of 138656070 is about 517.5825535177.

The spelling of 138656070 in words is "one hundred thirty-eight million, six hundred fifty-six thousand, seventy".