8231985 has 12 divisors (see below), whose sum is σ = 14268852. Its totient is φ = 4390368.

The previous prime is 8231947. The next prime is 8232001. The reversal of 8231985 is 5891328.

It can be written as a sum of positive squares in 2 ways, for example, as 2742336 + 5489649 = 1656^2 + 2343^2 .

It is not a de Polignac number, because 8231985 - 2⁹ = 8231473 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 91422 + ... + 91511.

It is an arithmetic number, because the mean of its divisors is an integer number (1189071).

Almost surely, 2^8231985 is an apocalyptic number.

It is an amenable number.

8231985 is a deficient number, since it is larger than the sum of its proper divisors (6036867).

8231985 is a wasteful number, since it uses less digits than its factorization.

8231985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182944 (or 182941 counting only the distinct ones).

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

The square root of 8231985 is about 2869.1436004494. The cubic root of 8231985 is about 201.9148172027.

It can be divided in two parts, 8231 and 985, that added together give a square (9216 = 96²).

The spelling of 8231985 in words is "eight million, two hundred thirty-one thousand, nine hundred eighty-five".