31899852 has 48 divisors (see below), whose sum is σ = 84278880. Its totient is φ = 10430784.

The previous prime is 31899811. The next prime is 31899853. The reversal of 31899852 is 25899813.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31899798 and 31899807.

It is not an unprimeable number, because it can be changed into a prime (31899853) 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, 2938 + ... + 8510.

It is an arithmetic number, because the mean of its divisors is an integer number (1755810).

Almost surely, 2^31899852 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 31899852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42139440).

31899852 is an abundant number, since it is smaller than the sum of its proper divisors (52379028).

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

31899852 is a wasteful number, since it uses less digits than its factorization.

31899852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5639 (or 5631 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 31899852 is about 5647.9953965987. The cubic root of 31899852 is about 317.1486662820.

It can be divided in two parts, 3189 and 9852, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 31899852 in words is "thirty-one million, eight hundred ninety-nine thousand, eight hundred fifty-two".