31980192 has 96 divisors (see below), whose sum is σ = 89812800. Its totient is φ = 9934848.

The previous prime is 31980187. The next prime is 31980199. The reversal of 31980192 is 29108913.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (31980199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162238 + ... + 162434.

It is an arithmetic number, because the mean of its divisors is an integer number (935550).

Almost surely, 2^31980192 is an apocalyptic number.

31980192 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31980192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44906400).

31980192 is an abundant number, since it is smaller than the sum of its proper divisors (57832608).

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

31980192 is a wasteful number, since it uses less digits than its factorization.

31980192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 31980192 is about 5655.1031820825. The cubic root of 31980192 is about 317.4146901227.

The spelling of 31980192 in words is "thirty-one million, nine hundred eighty thousand, one hundred ninety-two".