31444401320 has 64 divisors (see below), whose sum is σ = 71780385600. Its totient is φ = 12395496960.

The previous prime is 31444401319. The next prime is 31444401343. The reversal of 31444401320 is 2310444413.

It is a self number, because there is not a number n which added to its sum of digits gives 31444401320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1078535 + ... + 1107305.

It is an arithmetic number, because the mean of its divisors is an integer number (1121568525).

Almost surely, 2^31444401320 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 31444401320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35890192800).

31444401320 is an abundant number, since it is smaller than the sum of its proper divisors (40335984280).

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

31444401320 is a wasteful number, since it uses less digits than its factorization.

31444401320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29178 (or 29174 counting only the distinct ones).

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

Adding to 31444401320 its reverse (2310444413), we get a palindrome (33754845733).

The spelling of 31444401320 in words is "thirty-one billion, four hundred forty-four million, four hundred one thousand, three hundred twenty".