138900232 has 16 divisors (see below), whose sum is σ = 260569260. Its totient is φ = 69415104.

The previous prime is 138900221. The next prime is 138900247. The reversal of 138900232 is 232009831.

It can be written as a sum of positive squares in 2 ways, for example, as 131469156 + 7431076 = 11466^2 + 2726^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138900232.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21438 + ... + 27154.

Almost surely, 2^138900232 is an apocalyptic number.

It is an amenable number.

138900232 is a deficient number, since it is larger than the sum of its proper divisors (121669028).

138900232 is a wasteful number, since it uses less digits than its factorization.

138900232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8760 (or 8756 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 138900232 is about 11785.5942573975. The cubic root of 138900232 is about 517.8861822153.

The spelling of 138900232 in words is "one hundred thirty-eight million, nine hundred thousand, two hundred thirty-two".