138470624 has 24 divisors (see below), whose sum is σ = 274429008. Its totient is φ = 68774400.

The previous prime is 138470599. The next prime is 138470639. The reversal of 138470624 is 426074831.

It is a super-2 number, since 2×138470624² = 38348227421898752, which contains 22 as substring.

It is a congruent number.

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, 9497 + ... + 19160.

It is an arithmetic number, because the mean of its divisors is an integer number (11434542).

Almost surely, 2^138470624 is an apocalyptic number.

It is an amenable number.

138470624 is a deficient number, since it is larger than the sum of its proper divisors (135958384).

138470624 is a wasteful number, since it uses less digits than its factorization.

138470624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28818 (or 28810 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 138470624 is about 11767.3541631074. The cubic root of 138470624 is about 517.3517030947.

The spelling of 138470624 in words is "one hundred thirty-eight million, four hundred seventy thousand, six hundred twenty-four".