31044400000 has 96 divisors (see below), whose sum is σ = 77303880360. Its totient is φ = 12417600000.

The previous prime is 31044399977. The next prime is 31044400019. The reversal of 31044400000 is 444013.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 361195 + ... + 438805.

Almost surely, 2^31044400000 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 31044400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38651940180).

31044400000 is an abundant number, since it is smaller than the sum of its proper divisors (46259480360).

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

31044400000 is an frugal number, since it uses more digits than its factorization.

31044400000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77650 (or 77618 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 31044400000 its reverse (444013), we get a palindrome (31044844013).

The spelling of 31044400000 in words is "thirty-one billion, forty-four million, four hundred thousand".