400465816 has 16 divisors (see below), whose sum is σ = 751762440. Its totient is φ = 199995840.

The previous prime is 400465801. The next prime is 400465817. The reversal of 400465816 is 618564004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400465817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22350 + ... + 36061.

Almost surely, 2^400465816 is an apocalyptic number.

It is an amenable number.

400465816 is a deficient number, since it is larger than the sum of its proper divisors (351296624).

400465816 is a wasteful number, since it uses less digits than its factorization.

400465816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59274 (or 59270 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 400465816 is about 20011.6420115892. The cubic root of 400465816 is about 737.0922022446.

The spelling of 400465816 in words is "four hundred million, four hundred sixty-five thousand, eight hundred sixteen".