85581868 has 24 divisors (see below), whose sum is σ = 154154000. Its totient is φ = 41549760.

The previous prime is 85581857. The next prime is 85581887. The reversal of 85581868 is 86818558.

It is a super-2 number, since 2×85581868² = 14648512260738848, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 29758 + ... + 32506.

Almost surely, 2^85581868 is an apocalyptic number.

It is an amenable number.

85581868 is a deficient number, since it is larger than the sum of its proper divisors (68572132).

85581868 is a wasteful number, since it uses less digits than its factorization.

85581868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2977 (or 2975 counting only the distinct ones).

The product of its digits is 614400, while the sum is 49.

The square root of 85581868 is about 9251.0468596803. The cubic root of 85581868 is about 440.6839706665.

The spelling of 85581868 in words is "eighty-five million, five hundred eighty-one thousand, eight hundred sixty-eight".