400864812 has 24 divisors (see below), whose sum is σ = 984580800. Its totient is φ = 126588816.

The previous prime is 400864801. The next prime is 400864829. The reversal of 400864812 is 218468004.

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, 878862 + ... + 879317.

It is an arithmetic number, because the mean of its divisors is an integer number (41024200).

Almost surely, 2^400864812 is an apocalyptic number.

It is an amenable number.

400864812 is an abundant number, since it is smaller than the sum of its proper divisors (583715988).

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

400864812 is a wasteful number, since it uses less digits than its factorization.

400864812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758205 (or 1758203 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 400864812 is about 20021.6086266813. The cubic root of 400864812 is about 737.3369166165.

The spelling of 400864812 in words is "four hundred million, eight hundred sixty-four thousand, eight hundred twelve".