31890096 has 120 divisors (see below), whose sum is σ = 108055584. Its totient is φ = 8570880.

The previous prime is 31890091. The next prime is 31890101. The reversal of 31890096 is 69009813.

It is an interprime number because it is at equal distance from previous prime (31890091) and next prime (31890101).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 31890096.

It is not an unprimeable number, because it can be changed into a prime (31890091) 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 23 ways as a sum of consecutive naturals, for example, 16206 + ... + 18066.

Almost surely, 2^31890096 is an apocalyptic number.

31890096 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31890096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54027792).

31890096 is an abundant number, since it is smaller than the sum of its proper divisors (76165488).

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

31890096 is a wasteful number, since it uses less digits than its factorization.

31890096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899 (or 1890 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 31890096 is about 5647.1316612950. The cubic root of 31890096 is about 317.1163315670.

The spelling of 31890096 in words is "thirty-one million, eight hundred ninety thousand, ninety-six".