400322343344 has 160 divisors (see below), whose sum is σ = 1014453642240. Its totient is φ = 148469529600.

The previous prime is 400322343319. The next prime is 400322343359. The reversal of 400322343344 is 443343223004.

It is a super-2 number, since 2×400322343344² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400322343344.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2457782 + ... + 2615594.

It is an arithmetic number, because the mean of its divisors is an integer number (6340335264).

Almost surely, 2^400322343344 is an apocalyptic number.

400322343344 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400322343344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (507226821120).

400322343344 is an abundant number, since it is smaller than the sum of its proper divisors (614131298896).

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

400322343344 is a wasteful number, since it uses less digits than its factorization.

400322343344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157939 (or 157933 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 32.

Adding to 400322343344 its reverse (443343223004), we get a palindrome (843665566348).

The spelling of 400322343344 in words is "four hundred billion, three hundred twenty-two million, three hundred forty-three thousand, three hundred forty-four".