400664716 has 12 divisors (see below), whose sum is σ = 701704080. Its totient is φ = 200177840.

The previous prime is 400664699. The next prime is 400664717. The reversal of 400664716 is 617466004.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (400664717) 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, 32695 + ... + 43246.

It is an arithmetic number, because the mean of its divisors is an integer number (58475340).

Almost surely, 2^400664716 is an apocalyptic number.

It is an amenable number.

400664716 is a deficient number, since it is larger than the sum of its proper divisors (301039364).

400664716 is a wasteful number, since it uses less digits than its factorization.

400664716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77264 (or 77262 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 400664716 is about 20016.6110018654. The cubic root of 400664716 is about 737.2142129697.

The spelling of 400664716 in words is "four hundred million, six hundred sixty-four thousand, seven hundred sixteen".