31889052 has 120 divisors (see below), whose sum is σ = 91923216. Its totient is φ = 9580032.

The previous prime is 31888999. The next prime is 31889057. The reversal of 31889052 is 25098813.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 31888998 and 31889016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31889057) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 282148 + ... + 282260.

Almost surely, 2^31889052 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 31889052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45961608).

31889052 is an abundant number, since it is smaller than the sum of its proper divisors (60034164).

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

31889052 is a wasteful number, since it uses less digits than its factorization.

31889052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 31889052 is about 5647.0392242307. The cubic root of 31889052 is about 317.1128710040.

The spelling of 31889052 in words is "thirty-one million, eight hundred eighty-nine thousand, fifty-two".