31989248 has 40 divisors (see below), whose sum is σ = 65447448. Its totient is φ = 15611904.

The previous prime is 31989229. The next prime is 31989259. The reversal of 31989248 is 84298913.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31989199 and 31989208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21290 + ... + 22742.

Almost surely, 2^31989248 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 31989248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32723724).

31989248 is an abundant number, since it is smaller than the sum of its proper divisors (33458200).

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

31989248 is an equidigital number, since it uses as much as digits as its factorization.

31989248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514 (or 1498 counting only the distinct ones).

The product of its digits is 124416, while the sum is 44.

The square root of 31989248 is about 5655.9038181355. The cubic root of 31989248 is about 317.4446486269. Note that the first 3 decimals are identical.

The spelling of 31989248 in words is "thirty-one million, nine hundred eighty-nine thousand, two hundred forty-eight".