404001036 has 18 divisors (see below), whose sum is σ = 1021224932. Its totient is φ = 134667000.

The previous prime is 404001019. The next prime is 404001061. The reversal of 404001036 is 630100404.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

404001036 is a modest number, since divided by 1036 gives 404 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5611090 + ... + 5611161.

Almost surely, 2^404001036 is an apocalyptic number.

It is an amenable number.

404001036 is an abundant number, since it is smaller than the sum of its proper divisors (617223896).

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

404001036 is a wasteful number, since it uses less digits than its factorization.

404001036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11222261 (or 11222256 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 404001036 is about 20099.7770136885. Note that the first 3 decimals coincide. The cubic root of 404001036 is about 739.2548110746.

The spelling of 404001036 in words is "four hundred four million, one thousand, thirty-six".