404400808 has 32 divisors (see below), whose sum is σ = 869976000. Its totient is φ = 172634112.

The previous prime is 404400803. The next prime is 404400827. The reversal of 404400808 is 808004404.

It is a happy number.

It is a super-2 number, since 2×404400808² = 327080027022105728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (404400803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343 + ... + 28441.

It is an arithmetic number, because the mean of its divisors is an integer number (27186750).

Almost surely, 2^404400808 is an apocalyptic number.

It is an amenable number.

404400808 is an abundant number, since it is smaller than the sum of its proper divisors (465575192).

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

404400808 is a wasteful number, since it uses less digits than its factorization.

404400808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28369 (or 28365 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 404400808 is about 20109.7192421973. The cubic root of 404400808 is about 739.4985694825.

The spelling of 404400808 in words is "four hundred four million, four hundred thousand, eight hundred eight".