400423044 has 24 divisors (see below), whose sum is σ = 1067795008. Its totient is φ = 114406560.

The previous prime is 400423027. The next prime is 400423069. The reversal of 400423044 is 440324004.

It is a super-2 number, since 2×400423044² = 320677228332451872, which contains 22 as substring.

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 400423044.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2383387 + ... + 2383554.

Almost surely, 2^400423044 is an apocalyptic number.

It is an amenable number.

400423044 is an abundant number, since it is smaller than the sum of its proper divisors (667371964).

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

400423044 is a wasteful number, since it uses less digits than its factorization.

400423044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4766955 (or 4766953 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 400423044 is about 20010.5733051305. The cubic root of 400423044 is about 737.0659594469.

Adding to 400423044 its reverse (440324004), we get a palindrome (840747048).

The spelling of 400423044 in words is "four hundred million, four hundred twenty-three thousand, forty-four".