400822872 has 64 divisors (see below), whose sum is σ = 1079049600. Its totient is φ = 123609600.

The previous prime is 400822867. The next prime is 400822897. The reversal of 400822872 is 278228004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15747 + ... + 32397.

It is an arithmetic number, because the mean of its divisors is an integer number (16860150).

Almost surely, 2^400822872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400822872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (539524800).

400822872 is an abundant number, since it is smaller than the sum of its proper divisors (678226728).

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

400822872 is a wasteful number, since it uses less digits than its factorization.

400822872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16736 (or 16732 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 400822872 is about 20020.5612308946. The cubic root of 400822872 is about 737.3112013895.

The spelling of 400822872 in words is "four hundred million, eight hundred twenty-two thousand, eight hundred seventy-two".