64138504 has 16 divisors (see below), whose sum is σ = 124139520. Its totient is φ = 31034640.

The previous prime is 64138483. The next prime is 64138523. The reversal of 64138504 is 40583146.

It is a happy number.

It is a super-2 number, since 2×64138504² = 8227495390716032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129064 + ... + 129559.

It is an arithmetic number, because the mean of its divisors is an integer number (7758720).

Almost surely, 2^64138504 is an apocalyptic number.

It is an amenable number.

64138504 is a deficient number, since it is larger than the sum of its proper divisors (60001016).

64138504 is a wasteful number, since it uses less digits than its factorization.

64138504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258660 (or 258656 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 64138504 is about 8008.6518216239. The cubic root of 64138504 is about 400.2883420971.

The spelling of 64138504 in words is "sixty-four million, one hundred thirty-eight thousand, five hundred four".