138930832 has 20 divisors (see below), whose sum is σ = 269512636. Its totient is φ = 69379200.

The previous prime is 138930821. The next prime is 138930863. The reversal of 138930832 is 238039831.

It can be written as a sum of positive squares in 2 ways, for example, as 126427536 + 12503296 = 11244^2 + 3536^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138930791 and 138930800.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9082 + ... + 18982.

Almost surely, 2^138930832 is an apocalyptic number.

It is an amenable number.

138930832 is a deficient number, since it is larger than the sum of its proper divisors (130581804).

138930832 is an equidigital number, since it uses as much as digits as its factorization.

138930832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10786 (or 10780 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 138930832 is about 11786.8923809459. The cubic root of 138930832 is about 517.9242098782.

The spelling of 138930832 in words is "one hundred thirty-eight million, nine hundred thirty thousand, eight hundred thirty-two".