138375402 has 16 divisors (see below), whose sum is σ = 301910112. Its totient is φ = 41931920.

The previous prime is 138375371. The next prime is 138375467. The reversal of 138375402 is 204573831.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1048233 + ... + 1048364.

It is an arithmetic number, because the mean of its divisors is an integer number (18869382).

Almost surely, 2^138375402 is an apocalyptic number.

138375402 is an abundant number, since it is smaller than the sum of its proper divisors (163534710).

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

138375402 is a wasteful number, since it uses less digits than its factorization.

138375402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096613.

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

The square root of 138375402 is about 11763.3074430621. The cubic root of 138375402 is about 517.2330869362.

The spelling of 138375402 in words is "one hundred thirty-eight million, three hundred seventy-five thousand, four hundred two".