390421392 has 20 divisors (see below), whose sum is σ = 1008588720. Its totient is φ = 130140448.

The previous prime is 390421379. The next prime is 390421399. The reversal of 390421392 is 293124093.

It is not an unprimeable number, because it can be changed into a prime (390421399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4066842 + ... + 4066937.

It is an arithmetic number, because the mean of its divisors is an integer number (50429436).

Almost surely, 2^390421392 is an apocalyptic number.

It is an amenable number.

390421392 is an abundant number, since it is smaller than the sum of its proper divisors (618167328).

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

390421392 is a wasteful number, since it uses less digits than its factorization.

390421392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8133790 (or 8133784 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 390421392 is about 19759.0837844268. The cubic root of 390421392 is about 730.8774037535.

The spelling of 390421392 in words is "three hundred ninety million, four hundred twenty-one thousand, three hundred ninety-two".