400557146 has 16 divisors (see below), whose sum is σ = 667826208. Its totient is φ = 178635600.

The previous prime is 400557133. The next prime is 400557149. The reversal of 400557146 is 641755004.

It is not an unprimeable number, because it can be changed into a prime (400557149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170600 + ... + 172931.

It is an arithmetic number, because the mean of its divisors is an integer number (41739138).

Almost surely, 2^400557146 is an apocalyptic number.

400557146 is a deficient number, since it is larger than the sum of its proper divisors (267269062).

400557146 is a wasteful number, since it uses less digits than its factorization.

400557146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343597.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 400557146 is about 20013.9238031926. The cubic root of 400557146 is about 737.1482315911.

The spelling of 400557146 in words is "four hundred million, five hundred fifty-seven thousand, one hundred forty-six".