390939402 has 64 divisors (see below), whose sum is σ = 962565120. Its totient is φ = 103348224.

The previous prime is 390939397. The next prime is 390939403. The reversal of 390939402 is 204939093.

It is a super-2 number, since 2×390939402² = 305667232072235208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (390939403) 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 31 ways as a sum of consecutive naturals, for example, 28618 + ... + 40010.

It is an arithmetic number, because the mean of its divisors is an integer number (15040080).

Almost surely, 2^390939402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390939402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (481282560).

390939402 is an abundant number, since it is smaller than the sum of its proper divisors (571625718).

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

390939402 is a wasteful number, since it uses less digits than its factorization.

390939402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11467.

The product of its (nonzero) digits is 52488, while the sum is 39.

The square root of 390939402 is about 19772.1875876191. The cubic root of 390939402 is about 731.2005029248.

The spelling of 390939402 in words is "three hundred ninety million, nine hundred thirty-nine thousand, four hundred two".