139857932 has 24 divisors (see below), whose sum is σ = 249648672. Its totient is φ = 68544000.

The previous prime is 139857919. The next prime is 139857943. The reversal of 139857932 is 239758931.

It is a super-2 number, since 2×139857932² = 39120482286633248, which contains 22 as substring.

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, 39932 + ... + 43292.

It is an arithmetic number, because the mean of its divisors is an integer number (10402028).

Almost surely, 2^139857932 is an apocalyptic number.

It is an amenable number.

139857932 is a deficient number, since it is larger than the sum of its proper divisors (109790740).

139857932 is a wasteful number, since it uses less digits than its factorization.

139857932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569 (or 3567 counting only the distinct ones).

The product of its digits is 408240, while the sum is 47.

The square root of 139857932 is about 11826.1545736558. The cubic root of 139857932 is about 519.0737109183.

Subtracting 139857932 from its reverse (239758931), we obtain a palindrome (99900999).

The spelling of 139857932 in words is "one hundred thirty-nine million, eight hundred fifty-seven thousand, nine hundred thirty-two".