138375250 has 32 divisors (see below), whose sum is σ = 278971056. Its totient is φ = 51091200.

The previous prime is 138375239. The next prime is 138375283. The reversal of 138375250 is 52573831.

It can be written as a sum of positive squares in 8 ways, for example, as 6974881 + 131400369 = 2641^2 + 11463^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18039 + ... + 24538.

Almost surely, 2^138375250 is an apocalyptic number.

138375250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138375250 is an abundant number, since it is smaller than the sum of its proper divisors (140595806).

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

138375250 is a wasteful number, since it uses less digits than its factorization.

138375250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42607 (or 42597 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 138375250 is about 11763.3009822923. The cubic root of 138375250 is about 517.2328975493.

The spelling of 138375250 in words is "one hundred thirty-eight million, three hundred seventy-five thousand, two hundred fifty".