404641656 has 56 divisors (see below), whose sum is σ = 1137550680. Its totient is φ = 134878608.

The previous prime is 404641621. The next prime is 404641673. The reversal of 404641656 is 656146404.

404641656 is a `hidden beast` number, since 4 + 0 + 4 + 641 + 6 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 404641656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 28860 + ... + 40523.

It is an arithmetic number, because the mean of its divisors is an integer number (20313405).

Almost surely, 2^404641656 is an apocalyptic number.

It is an amenable number.

404641656 is an abundant number, since it is smaller than the sum of its proper divisors (732909024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404641656 is an equidigital number, since it uses as much as digits as its factorization.

404641656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69407 (or 69388 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 404641656 is about 20115.7066989952. The cubic root of 404641656 is about 739.6453474656.

The spelling of 404641656 in words is "four hundred four million, six hundred forty-one thousand, six hundred fifty-six".