400432331404 has 18 divisors (see below), whose sum is σ = 815165817900. Its totient is φ = 171613856232.

The previous prime is 400432331393. The next prime is 400432331413. The reversal of 400432331404 is 404133234004.

It is a super-2 number, since 2×400432331404² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1021510854 + ... + 1021511245.

Almost surely, 2^400432331404 is an apocalyptic number.

It is an amenable number.

400432331404 is an abundant number, since it is smaller than the sum of its proper divisors (414733486496).

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

400432331404 is a wasteful number, since it uses less digits than its factorization.

400432331404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043022117 (or 2043022108 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 400432331404 its reverse (404133234004), we get a palindrome (804565565408).

The spelling of 400432331404 in words is "four hundred billion, four hundred thirty-two million, three hundred thirty-one thousand, four hundred four".