404395684388 has 12 divisors (see below), whose sum is σ = 732095635740. Its totient is φ = 195225502752.

The previous prime is 404395684313. The next prime is 404395684477. The reversal of 404395684388 is 883486593404.

It can be written as a sum of positive squares in 2 ways, for example, as 80033541604 + 324362142784 = 282902^2 + 569528^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 404395684388.

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, 1743084731 + ... + 1743084962.

It is an arithmetic number, because the mean of its divisors is an integer number (61007969645).

Almost surely, 2^404395684388 is an apocalyptic number.

It is an amenable number.

404395684388 is a deficient number, since it is larger than the sum of its proper divisors (327699951352).

404395684388 is a wasteful number, since it uses less digits than its factorization.

404395684388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3486169726 (or 3486169724 counting only the distinct ones).

The product of its (nonzero) digits is 79626240, while the sum is 62.

The spelling of 404395684388 in words is "four hundred four billion, three hundred ninety-five million, six hundred eighty-four thousand, three hundred eighty-eight".