31488768 has 108 divisors (see below), whose sum is σ = 92470560. Its totient is φ = 10303488.

The previous prime is 31488767. The next prime is 31488797. The reversal of 31488768 is 86788413.

It is not an unprimeable number, because it can be changed into a prime (31488767) 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, 181930 + ... + 182102.

Almost surely, 2^31488768 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 31488768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46235280).

31488768 is an abundant number, since it is smaller than the sum of its proper divisors (60981792).

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

31488768 is a wasteful number, since it uses less digits than its factorization.

31488768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 257 counting only the distinct ones).

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

The square root of 31488768 is about 5611.4853648566. The cubic root of 31488768 is about 315.7804381976.

The spelling of 31488768 in words is "thirty-one million, four hundred eighty-eight thousand, seven hundred sixty-eight".