31308 has 12 divisors (see below), whose sum is σ = 73080. Its totient is φ = 10432.

The previous prime is 31307. The next prime is 31319. The reversal of 31308 is 80313.

31308 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (31307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1293 + ... + 1316.

It is an arithmetic number, because the mean of its divisors is an integer number (6090).

2³¹³⁰⁸ is an apocalyptic number.

It is an amenable number.

31308 is an abundant number, since it is smaller than the sum of its proper divisors (41772).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36540).

31308 is a wasteful number, since it uses less digits than its factorization.

31308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616 (or 2614 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31308 is about 176.9406680218. The cubic root of 31308 is about 31.5175009829.

The spelling of 31308 in words is "thirty-one thousand, three hundred eight".