394564426792 has 16 divisors (see below), whose sum is σ = 739826441460. Its totient is φ = 197277375744.

The previous prime is 394564426777. The next prime is 394564426813. The reversal of 394564426792 is 297624465493.

It can be written as a sum of positive squares in 2 ways, for example, as 346457023236 + 48107403556 = 588606^2 + 219334^2 .

It is a super-2 number, since 2×394564426792² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 394564426792.

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, 245523 + ... + 921634.

Almost surely, 2^394564426792 is an apocalyptic number.

It is an amenable number.

394564426792 is a deficient number, since it is larger than the sum of its proper divisors (345262014668).

394564426792 is a wasteful number, since it uses less digits than its factorization.

394564426792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209420 (or 1209416 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 61.

The spelling of 394564426792 in words is "three hundred ninety-four billion, five hundred sixty-four million, four hundred twenty-six thousand, seven hundred ninety-two".