400831408 has 20 divisors (see below), whose sum is σ = 777034840. Its totient is φ = 200306304.

The previous prime is 400831367. The next prime is 400831433. The reversal of 400831408 is 804138004.

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, 29116 + ... + 40612.

It is an arithmetic number, because the mean of its divisors is an integer number (38851742).

Almost surely, 2^400831408 is an apocalyptic number.

It is an amenable number.

400831408 is a deficient number, since it is larger than the sum of its proper divisors (376203432).

400831408 is a wasteful number, since it uses less digits than its factorization.

400831408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13684 (or 13678 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 400831408 is about 20020.7744105966. The cubic root of 400831408 is about 737.3164353255.

The spelling of 400831408 in words is "four hundred million, eight hundred thirty-one thousand, four hundred eight".