390404004 has 24 divisors (see below), whose sum is σ = 914336640. Its totient is φ = 129649824.

The previous prime is 390403999. The next prime is 390404023. The reversal of 390404004 is 400404093.

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, 57244 + ... + 63699.

It is an arithmetic number, because the mean of its divisors is an integer number (38097360).

Almost surely, 2^390404004 is an apocalyptic number.

It is an amenable number.

390404004 is an abundant number, since it is smaller than the sum of its proper divisors (523932636).

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

390404004 is a wasteful number, since it uses less digits than its factorization.

390404004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121219 (or 121217 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 390404004 is about 19758.6437793691. The cubic root of 390404004 is about 730.8665533534.

Adding to 390404004 its reverse (400404093), we get a palindrome (790808097).

The spelling of 390404004 in words is "three hundred ninety million, four hundred four thousand, four".