394792305625 has 45 divisors (see below), whose sum is σ = 506484676929. Its totient is φ = 307627920000.

The previous prime is 394792305623. The next prime is 394792305643. The reversal of 394792305625 is 526503297493.

The square root of 394792305625 is 628325.

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

It can be written as a sum of positive squares in 22 ways, for example, as 11309769 + 394780995856 = 3363^2 + 628316^2 .

It is not a de Polignac number, because 394792305625 - 2¹ = 394792305623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394792305623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 644032819 + ... + 644033431.

Almost surely, 2^394792305625 is an apocalyptic number.

394792305625 is the 628325-th square number.

394792305625 is the 314163-rd centered octagonal number.

It is an amenable number.

394792305625 is a deficient number, since it is larger than the sum of its proper divisors (111692371304).

394792305625 is an frugal number, since it uses more digits than its factorization.

394792305625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 12247200, while the sum is 55.

The spelling of 394792305625 in words is "three hundred ninety-four billion, seven hundred ninety-two million, three hundred five thousand, six hundred twenty-five".