138079400 has 24 divisors (see below), whose sum is σ = 321035070. Its totient is φ = 55231680.

The previous prime is 138079399. The next prime is 138079421. The reversal of 138079400 is 4970831.

It can be written as a sum of positive squares in 3 ways, for example, as 51179716 + 86899684 = 7154^2 + 9322^2 .

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 5 ways as a sum of consecutive naturals, for example, 344999 + ... + 345398.

Almost surely, 2^138079400 is an apocalyptic number.

138079400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138079400 is an abundant number, since it is smaller than the sum of its proper divisors (182955670).

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

138079400 is a wasteful number, since it uses less digits than its factorization.

138079400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690413 (or 690404 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 138079400 is about 11750.7191269301. The cubic root of 138079400 is about 516.8640152565.

The spelling of 138079400 in words is "one hundred thirty-eight million, seventy-nine thousand, four hundred".