138611504 has 20 divisors (see below), whose sum is σ = 271961760. Its totient is φ = 68427840.

The previous prime is 138611497. The next prime is 138611533. The reversal of 138611504 is 405116831.

138611504 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138611504² = 38426298082284032, which contains 22 as substring.

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, 53567 + ... + 56094.

It is an arithmetic number, because the mean of its divisors is an integer number (13598088).

Almost surely, 2^138611504 is an apocalyptic number.

It is an amenable number.

138611504 is a deficient number, since it is larger than the sum of its proper divisors (133350256).

138611504 is a wasteful number, since it uses less digits than its factorization.

138611504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109748 (or 109742 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 138611504 is about 11773.3386938455. The cubic root of 138611504 is about 517.5270948185.

The spelling of 138611504 in words is "one hundred thirty-eight million, six hundred eleven thousand, five hundred four".