31748868 has 48 divisors (see below), whose sum is σ = 83460160. Its totient is φ = 10435392.

The previous prime is 31748863. The next prime is 31748897. The reversal of 31748868 is 86884713.

It is not an unprimeable number, because it can be changed into a prime (31748861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5871 + ... + 9897.

Almost surely, 2^31748868 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 31748868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41730080).

31748868 is an abundant number, since it is smaller than the sum of its proper divisors (51711292).

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

31748868 is a wasteful number, since it uses less digits than its factorization.

31748868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4113 (or 4105 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 31748868 is about 5634.6133851401. The cubic root of 31748868 is about 316.6475132768.

The spelling of 31748868 in words is "thirty-one million, seven hundred forty-eight thousand, eight hundred sixty-eight".