404618216 has 16 divisors (see below), whose sum is σ = 759417540. Its totient is φ = 202106880.

The previous prime is 404618209. The next prime is 404618257. The reversal of 404618216 is 612816404.

It can be written as a sum of positive squares in 2 ways, for example, as 404412100 + 206116 = 20110^2 + 454^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16601 + ... + 32936.

Almost surely, 2^404618216 is an apocalyptic number.

It is an amenable number.

404618216 is a deficient number, since it is larger than the sum of its proper divisors (354799324).

404618216 is a wasteful number, since it uses less digits than its factorization.

404618216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50564 (or 50560 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 404618216 is about 20115.1240612630. The cubic root of 404618216 is about 739.6310651811.

The spelling of 404618216 in words is "four hundred four million, six hundred eighteen thousand, two hundred sixteen".