390400304 has 40 divisors (see below), whose sum is σ = 875420160. Its totient is φ = 165192768.

The previous prime is 390400303. The next prime is 390400313. The reversal of 390400304 is 403004093.

It is a self number, because there is not a number n which added to its sum of digits gives 390400304.

It is not an unprimeable number, because it can be changed into a prime (390400301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13214 + ... + 30909.

It is an arithmetic number, because the mean of its divisors is an integer number (21885504).

Almost surely, 2^390400304 is an apocalyptic number.

It is an amenable number.

390400304 is an abundant number, since it is smaller than the sum of its proper divisors (485019856).

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

390400304 is a wasteful number, since it uses less digits than its factorization.

390400304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44217 (or 44211 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 390400304 is about 19758.5501492392. The cubic root of 390400304 is about 730.8642444505.

Adding to 390400304 its reverse (403004093), we get a palindrome (793404397).

The spelling of 390400304 in words is "three hundred ninety million, four hundred thousand, three hundred four".