139390924 has 24 divisors (see below), whose sum is σ = 247999248. Its totient is φ = 68544000.

The previous prime is 139390903. The next prime is 139390991. The reversal of 139390924 is 429093931.

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, 60799 + ... + 63049.

It is an arithmetic number, because the mean of its divisors is an integer number (10333302).

Almost surely, 2^139390924 is an apocalyptic number.

It is an amenable number.

139390924 is a deficient number, since it is larger than the sum of its proper divisors (108608324).

139390924 is a wasteful number, since it uses less digits than its factorization.

139390924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2505 (or 2503 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 139390924 is about 11806.3933527560. The cubic root of 139390924 is about 518.4953099395.

The spelling of 139390924 in words is "one hundred thirty-nine million, three hundred ninety thousand, nine hundred twenty-four".