394676564 has 24 divisors (see below), whose sum is σ = 697221000. Its totient is φ = 195478400.

The previous prime is 394676509. The next prime is 394676591. The reversal of 394676564 is 465676493.

It can be written as a sum of positive squares in 4 ways, for example, as 336400 + 394340164 = 580^2 + 19858^2 .

It is a congruent number.

It is an unprimeable number.

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, 302714 + ... + 304014.

It is an arithmetic number, because the mean of its divisors is an integer number (29050875).

Almost surely, 2^394676564 is an apocalyptic number.

It is an amenable number.

394676564 is a deficient number, since it is larger than the sum of its proper divisors (302544436).

394676564 is a wasteful number, since it uses less digits than its factorization.

394676564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963 (or 1961 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 50.

The square root of 394676564 is about 19866.4683323433. The cubic root of 394676564 is about 733.5230736761.

The spelling of 394676564 in words is "three hundred ninety-four million, six hundred seventy-six thousand, five hundred sixty-four".