138257064 has 64 divisors (see below), whose sum is σ = 418968000. Its totient is φ = 41895360.

The previous prime is 138257059. The next prime is 138257087. The reversal of 138257064 is 460752831.

138257064 is a `hidden beast` number, since 1 + 3 + 82 + 570 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26719 + ... + 31470.

It is an arithmetic number, because the mean of its divisors is an integer number (6546375).

Almost surely, 2^138257064 is an apocalyptic number.

It is an amenable number.

138257064 is an abundant number, since it is smaller than the sum of its proper divisors (280710936).

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

138257064 is a wasteful number, since it uses less digits than its factorization.

138257064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58215 (or 58205 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 138257064 is about 11758.2764043035. The cubic root of 138257064 is about 517.0855997749.

The spelling of 138257064 in words is "one hundred thirty-eight million, two hundred fifty-seven thousand, sixty-four".