404659620 has 72 divisors (see below), whose sum is σ = 1269810360. Its totient is φ = 104186880.

The previous prime is 404659597. The next prime is 404659621. The reversal of 404659620 is 26956404.

404659620 is a `hidden beast` number, since 4 + 0 + 46 + 596 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3779136 + 400880484 = 1944^2 + 20022^2 .

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

It is not an unprimeable number, because it can be changed into a prime (404659621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33541 + ... + 43980.

It is an arithmetic number, because the mean of its divisors is an integer number (17636255).

Almost surely, 2^404659620 is an apocalyptic number.

It is an amenable number.

404659620 is an abundant number, since it is smaller than the sum of its proper divisors (865150740).

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

404659620 is a wasteful number, since it uses less digits than its factorization.

404659620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77565 (or 77560 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 404659620 is about 20116.1532107906. The cubic root of 404659620 is about 739.6562927816.

The spelling of 404659620 in words is "four hundred four million, six hundred fifty-nine thousand, six hundred twenty".