400812832 has 24 divisors (see below), whose sum is σ = 901829376. Its totient is φ = 171776832.

The previous prime is 400812793. The next prime is 400812833. The reversal of 400812832 is 238218004.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 400812832.

It is not an unprimeable number, because it can be changed into a prime (400812833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 894448 + ... + 894895.

It is an arithmetic number, because the mean of its divisors is an integer number (37576224).

Almost surely, 2^400812832 is an apocalyptic number.

It is an amenable number.

400812832 is an abundant number, since it is smaller than the sum of its proper divisors (501016544).

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

400812832 is a wasteful number, since it uses less digits than its factorization.

400812832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789360 (or 1789352 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 400812832 is about 20020.3104871028. The cubic root of 400812832 is about 737.3050451655.

The spelling of 400812832 in words is "four hundred million, eight hundred twelve thousand, eight hundred thirty-two".