400109904 has 60 divisors (see below), whose sum is σ = 1178694400. Its totient is φ = 126349632.

The previous prime is 400109903. The next prime is 400109911. The reversal of 400109904 is 409901004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400109903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70384 + ... + 75855.

Almost surely, 2^400109904 is an apocalyptic number.

It is an amenable number.

400109904 is an abundant number, since it is smaller than the sum of its proper divisors (778584496).

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

400109904 is a wasteful number, since it uses less digits than its factorization.

400109904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146272 (or 146263 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 400109904 is about 20002.7474112933. The cubic root of 400109904 is about 736.8737751816.

The spelling of 400109904 in words is "four hundred million, one hundred nine thousand, nine hundred four".