139639472 has 20 divisors (see below), whose sum is σ = 309201936. Its totient is φ = 59845440.

The previous prime is 139639453. The next prime is 139639483. The reversal of 139639472 is 274936931.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 623279 + ... + 623502.

Almost surely, 2^139639472 is an apocalyptic number.

It is an amenable number.

139639472 is an abundant number, since it is smaller than the sum of its proper divisors (169562464).

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

139639472 is a wasteful number, since it uses less digits than its factorization.

139639472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246796 (or 1246790 counting only the distinct ones).

The product of its digits is 244944, while the sum is 44.

The square root of 139639472 is about 11816.9146565421. The cubic root of 139639472 is about 518.8033033339.

The spelling of 139639472 in words is "one hundred thirty-nine million, six hundred thirty-nine thousand, four hundred seventy-two".