404975406 has 32 divisors (see below), whose sum is σ = 902389248. Its totient is φ = 120107840.

The previous prime is 404975399. The next prime is 404975407. The reversal of 404975406 is 604579404.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404975407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62175 + ... + 68378.

It is an arithmetic number, because the mean of its divisors is an integer number (28199664).

Almost surely, 2^404975406 is an apocalyptic number.

404975406 is an abundant number, since it is smaller than the sum of its proper divisors (497413842).

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

404975406 is a wasteful number, since it uses less digits than its factorization.

404975406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130616.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 404975406 is about 20124.0007453786. Note that the first 3 decimals coincide. The cubic root of 404975406 is about 739.8486456948.

The spelling of 404975406 in words is "four hundred four million, nine hundred seventy-five thousand, four hundred six".