320704564 has 12 divisors (see below), whose sum is σ = 561979684. Its totient is φ = 160138944.

The previous prime is 320704523. The next prime is 320704577. The reversal of 320704564 is 465407023.

It can be written as a sum of positive squares in 2 ways, for example, as 196560400 + 124144164 = 14020^2 + 11142^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49929 + ... + 55984.

Almost surely, 2^320704564 is an apocalyptic number.

It is an amenable number.

320704564 is a deficient number, since it is larger than the sum of its proper divisors (241275120).

320704564 is a wasteful number, since it uses less digits than its factorization.

320704564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106674 (or 106672 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 320704564 is about 17908.2261544800. The cubic root of 320704564 is about 684.4920054849.

The spelling of 320704564 in words is "three hundred twenty million, seven hundred four thousand, five hundred sixty-four".