31979448 has 80 divisors (see below), whose sum is σ = 94873680. Its totient is φ = 10029312.

The previous prime is 31979447. The next prime is 31979471. The reversal of 31979448 is 84497913.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31979443) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9565 + ... + 12467.

It is an arithmetic number, because the mean of its divisors is an integer number (1185921).

Almost surely, 2^31979448 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 31979448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47436840).

31979448 is an abundant number, since it is smaller than the sum of its proper divisors (62894232).

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

31979448 is a wasteful number, since it uses less digits than its factorization.

31979448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938 (or 2925 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 31979448 is about 5655.0374004068. The cubic root of 31979448 is about 317.4122286161.

The spelling of 31979448 in words is "thirty-one million, nine hundred seventy-nine thousand, four hundred forty-eight".