31348812 has 96 divisors (see below), whose sum is σ = 84639744. Its totient is φ = 8942400.

The previous prime is 31348789. The next prime is 31348813. The reversal of 31348812 is 21884313.

It is a super-2 number, since 2×31348812² = 1965496027622688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31348812.

It is not an unprimeable number, because it can be changed into a prime (31348813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192243 + ... + 192405.

It is an arithmetic number, because the mean of its divisors is an integer number (881664).

Almost surely, 2^31348812 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 31348812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42319872).

31348812 is an abundant number, since it is smaller than the sum of its proper divisors (53290932).

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

31348812 is a wasteful number, since it uses less digits than its factorization.

31348812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 257 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 31348812 is about 5599.0009823182. Note that the first 3 decimals coincide. The cubic root of 31348812 is about 315.3119006908.

It can be divided in two parts, 31 and 348812, that added together give a palindrome (348843).

The spelling of 31348812 in words is "thirty-one million, three hundred forty-eight thousand, eight hundred twelve".