400665704 has 16 divisors (see below), whose sum is σ = 783911520. Its totient is φ = 191622640.

The previous prime is 400665697. The next prime is 400665719. The reversal of 400665704 is 407566004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1088582 + ... + 1088949.

It is an arithmetic number, because the mean of its divisors is an integer number (48994470).

Almost surely, 2^400665704 is an apocalyptic number.

It is an amenable number.

400665704 is a deficient number, since it is larger than the sum of its proper divisors (383245816).

400665704 is a wasteful number, since it uses less digits than its factorization.

400665704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2177560 (or 2177556 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 400665704 is about 20016.6356813526. The cubic root of 400665704 is about 737.2148189352.

The spelling of 400665704 in words is "four hundred million, six hundred sixty-five thousand, seven hundred four".