391960804 has 27 divisors (see below), whose sum is σ = 725325321. Its totient is φ = 185309280.

The previous prime is 391960799. The next prime is 391960819. The reversal of 391960804 is 408069193.

The square root of 391960804 is 19798.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 112402404 + 279558400 = 10602^2 + 16720^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 752064 + ... + 752584.

Almost surely, 2^391960804 is an apocalyptic number.

391960804 is the 19798-th square number.

It is an amenable number.

391960804 is a deficient number, since it is larger than the sum of its proper divisors (333364517).

391960804 is an equidigital number, since it uses as much as digits as its factorization.

391960804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The cubic root of 391960804 is about 731.8367483095.

Multiplying 391960804 by its product of nonzero digits (46656), we get a square (18287323271424 = 4276368²).

The spelling of 391960804 in words is "three hundred ninety-one million, nine hundred sixty thousand, eight hundred four".