405668904 has 16 divisors (see below), whose sum is σ = 1014172320. Its totient is φ = 135222960.

The previous prime is 405668903. The next prime is 405668927. The reversal of 405668904 is 409866504.

It is a super-2 number, since 2×405668904² = 329134519345122432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (405668903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8451412 + ... + 8451459.

It is an arithmetic number, because the mean of its divisors is an integer number (63385770).

Almost surely, 2^405668904 is an apocalyptic number.

It is an amenable number.

405668904 is an abundant number, since it is smaller than the sum of its proper divisors (608503416).

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

405668904 is a wasteful number, since it uses less digits than its factorization.

405668904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16902880 (or 16902876 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 405668904 is about 20141.2239945838. The cubic root of 405668904 is about 740.2707214975.

The spelling of 405668904 in words is "four hundred five million, six hundred sixty-eight thousand, nine hundred four".