400321013312 has 56 divisors (see below), whose sum is σ = 868018657152. Its totient is φ = 181667059200.

The previous prime is 400321013303. The next prime is 400321013357. The reversal of 400321013312 is 213310123004.

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, 32264 + ... + 895367.

Almost surely, 2^400321013312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400321013312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434009328576).

400321013312 is an abundant number, since it is smaller than the sum of its proper divisors (467697643840).

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

400321013312 is a wasteful number, since it uses less digits than its factorization.

400321013312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928267 (or 928257 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 400321013312 its reverse (213310123004), we get a palindrome (613631136316).

The spelling of 400321013312 in words is "four hundred billion, three hundred twenty-one million, thirteen thousand, three hundred twelve".