400511016 has 48 divisors (see below), whose sum is σ = 1093023360. Its totient is φ = 132481440.

The previous prime is 400511011. The next prime is 400511063. The reversal of 400511016 is 610115004.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 400511016.

It is not an unprimeable number, because it can be changed into a prime (400511011) 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, 11800 + ... + 30663.

It is an arithmetic number, because the mean of its divisors is an integer number (22771320).

Almost surely, 2^400511016 is an apocalyptic number.

It is an amenable number.

400511016 is an abundant number, since it is smaller than the sum of its proper divisors (692512344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400511016 is a wasteful number, since it uses less digits than its factorization.

400511016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42606 (or 42599 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 400511016 is about 20012.7713223331. The cubic root of 400511016 is about 737.1199327131.

The spelling of 400511016 in words is "four hundred million, five hundred eleven thousand, sixteen".