31889104 has 20 divisors (see below), whose sum is σ = 66538276. Its totient is φ = 14717952.

The previous prime is 31889089. The next prime is 31889107. The reversal of 31889104 is 40198813.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2729104 + 29160000 = 1652^2 + 5400^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31889104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31889107) 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 3 ways as a sum of consecutive naturals, for example, 76449 + ... + 76864.

Almost surely, 2^31889104 is an apocalyptic number.

It is an amenable number.

31889104 is an abundant number, since it is smaller than the sum of its proper divisors (34649172).

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

31889104 is a wasteful number, since it uses less digits than its factorization.

31889104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153334 (or 153328 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 31889104 is about 5647.0438284115. The cubic root of 31889104 is about 317.1130433710.

The spelling of 31889104 in words is "thirty-one million, eight hundred eighty-nine thousand, one hundred four".