8531985 has 64 divisors (see below), whose sum is σ = 17418240. Its totient is φ = 3463680.

The previous prime is 8531947. The next prime is 8532019. The reversal of 8531985 is 5891358.

It is not a de Polignac number, because 8531985 - 2⁹ = 8531473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 95821 + ... + 95909.

It is an arithmetic number, because the mean of its divisors is an integer number (272160).

Almost surely, 2^8531985 is an apocalyptic number.

It is an amenable number.

8531985 is an abundant number, since it is smaller than the sum of its proper divisors (8886255).

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

8531985 is a wasteful number, since it uses less digits than its factorization.

8531985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198.

The product of its digits is 43200, while the sum is 39.

The square root of 8531985 is about 2920.9561790619. The cubic root of 8531985 is about 204.3384184823.

The spelling of 8531985 in words is "eight million, five hundred thirty-one thousand, nine hundred eighty-five".