138299904 has 60 divisors (see below), whose sum is σ = 399156186. Its totient is φ = 46098432.

The previous prime is 138299899. The next prime is 138299923. The reversal of 138299904 is 409992831.

It can be written as a sum of positive squares in only one way, i.e., 138297600 + 2304 = 11760^2 + 48^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138299904.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10399 + ... + 19614.

Almost surely, 2^138299904 is an apocalyptic number.

It is an amenable number.

138299904 is an abundant number, since it is smaller than the sum of its proper divisors (260856282).

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

138299904 is an equidigital number, since it uses as much as digits as its factorization.

138299904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30037 (or 30018 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 138299904 is about 11760.0979587757. The cubic root of 138299904 is about 517.1390018914.

The spelling of 138299904 in words is "one hundred thirty-eight million, two hundred ninety-nine thousand, nine hundred four".