400320444312 has 48 divisors (see below), whose sum is σ = 1085668467000. Its totient is φ = 133259561856.

The previous prime is 400320444299. The next prime is 400320444317. The reversal of 400320444312 is 213444023004.

It is a happy number.

400320444312 is a `hidden beast` number, since 4 + 0 + 0 + 3 + 204 + 443 + 12 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400320444317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3708637 + ... + 3815052.

Almost surely, 2^400320444312 is an apocalyptic number.

It is an amenable number.

400320444312 is an abundant number, since it is smaller than the sum of its proper divisors (685348022688).

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

400320444312 is a wasteful number, since it uses less digits than its factorization.

400320444312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7524440 (or 7524433 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 400320444312 its reverse (213444023004), we get a palindrome (613764467316).

The spelling of 400320444312 in words is "four hundred billion, three hundred twenty million, four hundred forty-four thousand, three hundred twelve".