31995648 has 90 divisors (see below), whose sum is σ = 95467064. Its totient is φ = 10658304.

The previous prime is 31995643. The next prime is 31995679. The reversal of 31995648 is 84659913.

It is a happy number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31995643) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 19965 + ... + 21507.

Almost surely, 2^31995648 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 31995648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47733532).

31995648 is an abundant number, since it is smaller than the sum of its proper divisors (63471416).

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

31995648 is an equidigital number, since it uses as much as digits as its factorization.

31995648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571 (or 1548 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 31995648 is about 5656.4695703239. The cubic root of 31995648 is about 317.4658173049.

The spelling of 31995648 in words is "thirty-one million, nine hundred ninety-five thousand, six hundred forty-eight".