31955648 has 56 divisors (see below), whose sum is σ = 70116192. Its totient is φ = 14372864.

The previous prime is 31955641. The next prime is 31955653. The reversal of 31955648 is 84655913.

It is not an unprimeable number, because it can be changed into a prime (31955641) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24386 + ... + 25662.

Almost surely, 2^31955648 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 31955648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35058096).

31955648 is an abundant number, since it is smaller than the sum of its proper divisors (38160544).

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

31955648 is a wasteful number, since it uses less digits than its factorization.

31955648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329 (or 1319 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The square root of 31955648 is about 5652.9326902060. The cubic root of 31955648 is about 317.3334667200. Note that the first 3 decimals are identical.

The spelling of 31955648 in words is "thirty-one million, nine hundred fifty-five thousand, six hundred forty-eight".