400957905 has 16 divisors (see below), whose sum is σ = 648743040. Its totient is φ = 211440768.

The previous prime is 400957891. The next prime is 400957933. The reversal of 400957905 is 509759004.

It is not a de Polignac number, because 400957905 - 2⁴ = 400957889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148837 + ... + 151506.

It is an arithmetic number, because the mean of its divisors is an integer number (40546440).

Almost surely, 2^400957905 is an apocalyptic number.

It is an amenable number.

400957905 is a deficient number, since it is larger than the sum of its proper divisors (247785135).

400957905 is a wasteful number, since it uses less digits than its factorization.

400957905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300440.

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 400957905 is about 20023.9333049229. The cubic root of 400957905 is about 737.3939895504.

The spelling of 400957905 in words is "four hundred million, nine hundred fifty-seven thousand, nine hundred five".