139815952 has 20 divisors (see below), whose sum is σ = 279632896. Its totient is φ = 67652640.

The previous prime is 139815943. The next prime is 139815979. The reversal of 139815952 is 259518931.

It is a happy number.

139815952 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 139815899 and 139815908.

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, 140448 + ... + 141439.

Almost surely, 2^139815952 is an apocalyptic number.

It is an amenable number.

139815952 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

139815952 is a wasteful number, since it uses less digits than its factorization.

139815952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281926 (or 281920 counting only the distinct ones).

The product of its digits is 97200, while the sum is 43.

The square root of 139815952 is about 11824.3795608903. The cubic root of 139815952 is about 519.0217703652.

The spelling of 139815952 in words is "one hundred thirty-nine million, eight hundred fifteen thousand, nine hundred fifty-two".