401605884 has 24 divisors (see below), whose sum is σ = 1041200720. Its totient is φ = 133868592.

The previous prime is 401605873. The next prime is 401605913. The reversal of 401605884 is 488506104.

401605884 is a `hidden beast` number, since 40 + 1 + 605 + 8 + 8 + 4 = 666.

It is a super-2 number, since 2×401605884² = 322574572126842912, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1859179 + ... + 1859394.

Almost surely, 2^401605884 is an apocalyptic number.

It is an amenable number.

401605884 is an abundant number, since it is smaller than the sum of its proper divisors (639594836).

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

401605884 is a wasteful number, since it uses less digits than its factorization.

401605884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3718586 (or 3718578 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 401605884 is about 20040.1068859425. The cubic root of 401605884 is about 737.7910043401.

The spelling of 401605884 in words is "four hundred one million, six hundred five thousand, eight hundred eighty-four".