400423444 has 24 divisors (see below), whose sum is σ = 705635168. Its totient is φ = 198819360.

The previous prime is 400423433. The next prime is 400423487. The reversal of 400423444 is 444324004.

It is a super-3 number, since 3×400423444³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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, 579139 + ... + 579829.

Almost surely, 2^400423444 is an apocalyptic number.

It is an amenable number.

400423444 is a deficient number, since it is larger than the sum of its proper divisors (305211724).

400423444 is a wasteful number, since it uses less digits than its factorization.

400423444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 25.

The square root of 400423444 is about 20010.5832998441. The cubic root of 400423444 is about 737.0662048759.

Adding to 400423444 its reverse (444324004), we get a palindrome (844747448).

The spelling of 400423444 in words is "four hundred million, four hundred twenty-three thousand, four hundred forty-four".