400664715 has 64 divisors (see below), whose sum is σ = 740524032. Its totient is φ = 183075200.

The previous prime is 400664699. The next prime is 400664717. The reversal of 400664715 is 517466004.

It is not a de Polignac number, because 400664715 - 2⁴ = 400664699 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

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 63 ways as a sum of consecutive naturals, for example, 268702 + ... + 270188.

It is an arithmetic number, because the mean of its divisors is an integer number (11570688).

Almost surely, 2^400664715 is an apocalyptic number.

400664715 is a deficient number, since it is larger than the sum of its proper divisors (339859317).

400664715 is a wasteful number, since it uses less digits than its factorization.

400664715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 400664715 is about 20016.6109768862. The cubic root of 400664715 is about 737.2142123564.

The spelling of 400664715 in words is "four hundred million, six hundred sixty-four thousand, seven hundred fifteen".