400688974 has 24 divisors (see below), whose sum is σ = 707599368. Its totient is φ = 169651440.

The previous prime is 400688971. The next prime is 400688983. The reversal of 400688974 is 479886004.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400688971) 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, 16497 + ... + 32764.

It is an arithmetic number, because the mean of its divisors is an integer number (29483307).

Almost surely, 2^400688974 is an apocalyptic number.

400688974 is a deficient number, since it is larger than the sum of its proper divisors (306910394).

400688974 is a wasteful number, since it uses less digits than its factorization.

400688974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49360 (or 49353 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 400688974 is about 20017.2169394249. The cubic root of 400688974 is about 737.2290907305.

The spelling of 400688974 in words is "four hundred million, six hundred eighty-eight thousand, nine hundred seventy-four".