139840924 has 24 divisors (see below), whose sum is σ = 250069680. Its totient is φ = 68400384.

The previous prime is 139840919. The next prime is 139840927. The reversal of 139840924 is 429048931.

139840924 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139840927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93172 + ... + 94660.

It is an arithmetic number, because the mean of its divisors is an integer number (10419570).

Almost surely, 2^139840924 is an apocalyptic number.

It is an amenable number.

139840924 is a deficient number, since it is larger than the sum of its proper divisors (110228756).

139840924 is a wasteful number, since it uses less digits than its factorization.

139840924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989 (or 1987 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 139840924 is about 11825.4354676688. The cubic root of 139840924 is about 519.0526686996.

The spelling of 139840924 in words is "one hundred thirty-nine million, eight hundred forty thousand, nine hundred twenty-four".