400421404 has 12 divisors (see below), whose sum is σ = 701596728. Its totient is φ = 199965200.

The previous prime is 400421369. The next prime is 400421407. The reversal of 400421404 is 404124004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400421407) 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, 57682 + ... + 64249.

It is an arithmetic number, because the mean of its divisors is an integer number (58466394).

Almost surely, 2^400421404 is an apocalyptic number.

It is an amenable number.

400421404 is a deficient number, since it is larger than the sum of its proper divisors (301175324).

400421404 is a wasteful number, since it uses less digits than its factorization.

400421404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122756 (or 122754 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 400421404 is about 20010.5323267523. The cubic root of 400421404 is about 737.0649531863.

Adding to 400421404 its reverse (404124004), we get a palindrome (804545408).

The spelling of 400421404 in words is "four hundred million, four hundred twenty-one thousand, four hundred four".