85618992 has 20 divisors (see below), whose sum is σ = 221182520. Its totient is φ = 28539648.

The previous prime is 85618961. The next prime is 85619003. The reversal of 85618992 is 29981658.

It is a happy number.

It is a super-2 number, since 2×85618992² = 14661223582192128, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 1783729 = 85618992 / (8 + 5 + 6 + 1 + 8 + 9 + 9 + 2).

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 3 ways as a sum of consecutive naturals, for example, 891817 + ... + 891912.

It is an arithmetic number, because the mean of its divisors is an integer number (11059126).

Almost surely, 2^85618992 is an apocalyptic number.

It is an amenable number.

85618992 is an abundant number, since it is smaller than the sum of its proper divisors (135563528).

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

85618992 is a wasteful number, since it uses less digits than its factorization.

85618992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783740 (or 1783734 counting only the distinct ones).

The product of its digits is 311040, while the sum is 48.

The square root of 85618992 is about 9253.0531177552. The cubic root of 85618992 is about 440.7476819296.

The spelling of 85618992 in words is "eighty-five million, six hundred eighteen thousand, nine hundred ninety-two".