138723504 has 40 divisors (see below), whose sum is σ = 366708672. Its totient is φ = 45165120.

The previous prime is 138723493. The next prime is 138723509. The reversal of 138723504 is 405327831.

It is not an unprimeable number, because it can be changed into a prime (138723509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31542 + ... + 35669.

Almost surely, 2^138723504 is an apocalyptic number.

It is an amenable number.

138723504 is an abundant number, since it is smaller than the sum of its proper divisors (227985168).

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

138723504 is a wasteful number, since it uses less digits than its factorization.

138723504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67265 (or 67259 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 138723504 is about 11778.0942431278. The cubic root of 138723504 is about 517.6664469606. Note that the first 3 decimals are identical.

The spelling of 138723504 in words is "one hundred thirty-eight million, seven hundred twenty-three thousand, five hundred four".