400942790 has 16 divisors (see below), whose sum is σ = 764150112. Its totient is φ = 150943104.

The previous prime is 400942781. The next prime is 400942811. The reversal of 400942790 is 97249004.

It is a self number, because there is not a number n which added to its sum of digits gives 400942790.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1179074 + ... + 1179413.

It is an arithmetic number, because the mean of its divisors is an integer number (47759382).

Almost surely, 2^400942790 is an apocalyptic number.

400942790 is a deficient number, since it is larger than the sum of its proper divisors (363207322).

400942790 is a wasteful number, since it uses less digits than its factorization.

400942790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358511.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 400942790 is about 20023.5558780153. Note that the first 3 decimals coincide. The cubic root of 400942790 is about 737.3847235318.

The spelling of 400942790 in words is "four hundred million, nine hundred forty-two thousand, seven hundred ninety".