31288894848 has 96 divisors (see below), whose sum is σ = 90127159200. Its totient is φ = 10419194880.

The previous prime is 31288894843. The next prime is 31288894873. The reversal of 31288894848 is 84849888213.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31288894843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1183858 + ... + 1209998.

It is an arithmetic number, because the mean of its divisors is an integer number (938824575).

Almost surely, 2^31288894848 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 31288894848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45063579600).

31288894848 is an abundant number, since it is smaller than the sum of its proper divisors (58838264352).

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

31288894848 is a wasteful number, since it uses less digits than its factorization.

31288894848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27200 (or 27185 counting only the distinct ones).

The product of its digits is 28311552, while the sum is 63.

The spelling of 31288894848 in words is "thirty-one billion, two hundred eighty-eight million, eight hundred ninety-four thousand, eight hundred forty-eight".