138830952 has 32 divisors (see below), whose sum is σ = 373776480. Its totient is φ = 42717120.

The previous prime is 138830911. The next prime is 138830963. The reversal of 138830952 is 259038831.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 138830952.

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, 222174 + ... + 222797.

It is an arithmetic number, because the mean of its divisors is an integer number (11680515).

Almost surely, 2^138830952 is an apocalyptic number.

138830952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138830952 is an abundant number, since it is smaller than the sum of its proper divisors (234945528).

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

138830952 is a wasteful number, since it uses less digits than its factorization.

138830952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444993 (or 444989 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 138830952 is about 11782.6547093599. The cubic root of 138830952 is about 517.8000649567.

The spelling of 138830952 in words is "one hundred thirty-eight million, eight hundred thirty thousand, nine hundred fifty-two".