31424807288 has 48 divisors (see below), whose sum is σ = 68160796080. Its totient is φ = 13305348864.

The previous prime is 31424807279. The next prime is 31424807299. The reversal of 31424807288 is 88270842413.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 345056 + ... + 426512.

It is an arithmetic number, because the mean of its divisors is an integer number (1420016585).

Almost surely, 2^31424807288 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 31424807288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34080398040).

31424807288 is an abundant number, since it is smaller than the sum of its proper divisors (36735988792).

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

31424807288 is an equidigital number, since it uses as much as digits as its factorization.

31424807288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81636 (or 81549 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 47.

The spelling of 31424807288 in words is "thirty-one billion, four hundred twenty-four million, eight hundred seven thousand, two hundred eighty-eight".