31986048 has 64 divisors (see below), whose sum is σ = 87736320. Its totient is φ = 10314240.

The previous prime is 31986037. The next prime is 31986049. The reversal of 31986048 is 84068913.

It is a tau number, because it is divible by the number of its divisors (64).

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 31985997 and 31986015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31986049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10561 + ... + 13247.

It is an arithmetic number, because the mean of its divisors is an integer number (1370880).

Almost surely, 2^31986048 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 31986048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43868160).

31986048 is an abundant number, since it is smaller than the sum of its proper divisors (55750272).

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

31986048 is a wasteful number, since it uses less digits than its factorization.

31986048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735 (or 2723 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 31986048 is about 5655.6209208185. The cubic root of 31986048 is about 317.4340632290.

The spelling of 31986048 in words is "thirty-one million, nine hundred eighty-six thousand, forty-eight".