404918628 has 12 divisors (see below), whose sum is σ = 944810160. Its totient is φ = 134972872.

The previous prime is 404918623. The next prime is 404918641. The reversal of 404918628 is 826819404.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 404918628.

It is not an unprimeable number, because it can be changed into a prime (404918623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16871598 + ... + 16871621.

It is an arithmetic number, because the mean of its divisors is an integer number (78734180).

Almost surely, 2^404918628 is an apocalyptic number.

It is an amenable number.

404918628 is an abundant number, since it is smaller than the sum of its proper divisors (539891532).

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

404918628 is a wasteful number, since it uses less digits than its factorization.

404918628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33743226 (or 33743224 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 404918628 is about 20122.5899923444. The cubic root of 404918628 is about 739.8140682126.

The spelling of 404918628 in words is "four hundred four million, nine hundred eighteen thousand, six hundred twenty-eight".