400422401031320 has 128 divisors (see below), whose sum is σ = 933207357139200. Its totient is φ = 154448531091456.

The previous prime is 400422401031319. The next prime is 400422401031347. The reversal of 400422401031320 is 23130104224004.

It is a self number, because there is not a number n which added to its sum of digits gives 400422401031320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12841032449 + ... + 12841063631.

It is an arithmetic number, because the mean of its divisors is an integer number (7290682477650).

Almost surely, 2^{400422401031320} is an apocalyptic number.

400422401031320 is a gapful number since it is divisible by the number (40) 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 400422401031320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (466603678569600).

400422401031320 is an abundant number, since it is smaller than the sum of its proper divisors (532784956107880).

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

400422401031320 is a wasteful number, since it uses less digits than its factorization.

400422401031320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44997 (or 44993 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 400422401031320 its reverse (23130104224004), we get a palindrome (423552505255324).

The spelling of 400422401031320 in words is "four hundred trillion, four hundred twenty-two billion, four hundred one million, thirty-one thousand, three hundred twenty".