400436022 has 32 divisors (see below), whose sum is σ = 916699392. Its totient is φ = 114233184.

The previous prime is 400436017. The next prime is 400436033. The reversal of 400436022 is 220634004.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 400436022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21393 + ... + 35475.

It is an arithmetic number, because the mean of its divisors is an integer number (28646856).

Almost surely, 2^400436022 is an apocalyptic number.

400436022 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

400436022 is an abundant number, since it is smaller than the sum of its proper divisors (516263370).

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

400436022 is a wasteful number, since it uses less digits than its factorization.

400436022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14772.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 400436022 is about 20010.8975810682. The cubic root of 400436022 is about 737.0739223075.

The spelling of 400436022 in words is "four hundred million, four hundred thirty-six thousand, twenty-two".