400442341312 has 112 divisors (see below), whose sum is σ = 861281406720. Its totient is φ = 183628136448.

The previous prime is 400442341309. The next prime is 400442341339. The reversal of 400442341312 is 213143244004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231067998 + ... + 231069730.

It is an arithmetic number, because the mean of its divisors is an integer number (7690012560).

Almost surely, 2^400442341312 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 400442341312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430640703360).

400442341312 is an abundant number, since it is smaller than the sum of its proper divisors (460839065408).

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

400442341312 is a wasteful number, since it uses less digits than its factorization.

400442341312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3390 (or 3380 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 400442341312 its reverse (213143244004), we get a palindrome (613585585316).

The spelling of 400442341312 in words is "four hundred billion, four hundred forty-two million, three hundred forty-one thousand, three hundred twelve".