390839424 has 64 divisors (see below), whose sum is σ = 1092828000. Its totient is φ = 123420672.

The previous prime is 390839419. The next prime is 390839431. The reversal of 390839424 is 424938093.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

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, 19489 + ... + 34080.

Almost surely, 2^390839424 is an apocalyptic number.

It is an amenable number.

390839424 is an abundant number, since it is smaller than the sum of its proper divisors (701988576).

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

390839424 is a wasteful number, since it uses less digits than its factorization.

390839424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53605 (or 53593 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 390839424 is about 19769.6591776388. The cubic root of 390839424 is about 731.1381657303.

The spelling of 390839424 in words is "three hundred ninety million, eight hundred thirty-nine thousand, four hundred twenty-four".