404019872 has 24 divisors (see below), whose sum is σ = 816914196. Its totient is φ = 196549632.

The previous prime is 404019859. The next prime is 404019883. The reversal of 404019872 is 278910404.

It can be written as a sum of positive squares in 2 ways, for example, as 391881616 + 12138256 = 19796^2 + 3484^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169433 + ... + 171800.

Almost surely, 2^404019872 is an apocalyptic number.

It is an amenable number.

404019872 is an abundant number, since it is smaller than the sum of its proper divisors (412894324).

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

404019872 is a wasteful number, since it uses less digits than its factorization.

404019872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341280 (or 341272 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 404019872 is about 20100.2455706392. The cubic root of 404019872 is about 739.2662998134.

The spelling of 404019872 in words is "four hundred four million, nineteen thousand, eight hundred seventy-two".