390449328 has 40 divisors (see below), whose sum is σ = 1010792448. Its totient is φ = 129874752.

The previous prime is 390449327. The next prime is 390449329. The reversal of 390449328 is 823944093.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (390449327) and next prime (390449329).

It is a self number, because there is not a number n which added to its sum of digits gives 390449328.

It is not an unprimeable number, because it can be changed into a prime (390449327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15025 + ... + 31727.

Almost surely, 2^390449328 is an apocalyptic number.

It is an amenable number.

390449328 is an abundant number, since it is smaller than the sum of its proper divisors (620343120).

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

390449328 is a wasteful number, since it uses less digits than its factorization.

390449328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17201 (or 17195 counting only the distinct ones).

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

The square root of 390449328 is about 19759.7906871505. The cubic root of 390449328 is about 730.8948356059.

The spelling of 390449328 in words is "three hundred ninety million, four hundred forty-nine thousand, three hundred twenty-eight".