407881404 has 72 divisors (see below), whose sum is σ = 1218977760. Its totient is φ = 112516992.

The previous prime is 407881399. The next prime is 407881421. The reversal of 407881404 is 404188704.

It is a happy number.

It is a super-2 number, since 2×407881404² = 332734479458022432, 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 23 ways as a sum of consecutive naturals, for example, 20599 + ... + 35214.

Almost surely, 2^407881404 is an apocalyptic number.

It is an amenable number.

407881404 is an abundant number, since it is smaller than the sum of its proper divisors (811096356).

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

407881404 is a wasteful number, since it uses less digits than its factorization.

407881404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55859 (or 55854 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 407881404 is about 20196.0739749091. The cubic root of 407881404 is about 741.6140833373.

The spelling of 407881404 in words is "four hundred seven million, eight hundred eighty-one thousand, four hundred four".