31136896 has 128 divisors (see below), whose sum is σ = 78336000. Its totient is φ = 12026880.

The previous prime is 31136891. The next prime is 31136899. The reversal of 31136896 is 69863113.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31136891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 527715 + ... + 527773.

It is an arithmetic number, because the mean of its divisors is an integer number (612000).

Almost surely, 2^31136896 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 31136896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39168000).

31136896 is an abundant number, since it is smaller than the sum of its proper divisors (47199104).

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

31136896 is a wasteful number, since it uses less digits than its factorization.

31136896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 118 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 31136896 is about 5580.0444442674. The cubic root of 31136896 is about 314.5997974668.

The spelling of 31136896 in words is "thirty-one million, one hundred thirty-six thousand, eight hundred ninety-six".