404640366 has 16 divisors (see below), whose sum is σ = 871533264. Its totient is φ = 124504704.

The previous prime is 404640337. The next prime is 404640371. The reversal of 404640366 is 663046404.

It is a super-2 number, since 2×404640366² = 327467651593227912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2593771 + ... + 2593926.

It is an arithmetic number, because the mean of its divisors is an integer number (54470829).

Almost surely, 2^404640366 is an apocalyptic number.

404640366 is an abundant number, since it is smaller than the sum of its proper divisors (466892898).

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

404640366 is a wasteful number, since it uses less digits than its factorization.

404640366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5187715.

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 404640366 is about 20115.6746344735. The cubic root of 404640366 is about 739.6445614669.

The spelling of 404640366 in words is "four hundred four million, six hundred forty thousand, three hundred sixty-six".