31896085 has 16 divisors (see below), whose sum is σ = 42643440. Its totient is φ = 22740480.

The previous prime is 31896083. The next prime is 31896091. The reversal of 31896085 is 58069813.

31896085 = 3993² + 3994².

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 636804 + 31259281 = 798^2 + 5591^2 .

It is not a de Polignac number, because 31896085 - 2¹ = 31896083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31896083) 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 15 ways as a sum of consecutive naturals, for example, 6576 + ... + 10345.

It is an arithmetic number, because the mean of its divisors is an integer number (2665215).

Almost surely, 2^31896085 is an apocalyptic number.

31896085 is the 3994-th centered square number.

It is an amenable number.

31896085 is a deficient number, since it is larger than the sum of its proper divisors (10747355).

31896085 is a wasteful number, since it uses less digits than its factorization.

31896085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16968.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 31896085 is about 5647.6619056031. The cubic root of 31896085 is about 317.1361819393.

The spelling of 31896085 in words is "thirty-one million, eight hundred ninety-six thousand, eighty-five".