85819986 has 40 divisors (see below), whose sum is σ = 219774720. Its totient is φ = 24519672.

The previous prime is 85819963. The next prime is 85820023. The reversal of 85819986 is 68991858.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 19 ways as a sum of consecutive naturals, for example, 36706 + ... + 38973.

It is an arithmetic number, because the mean of its divisors is an integer number (5494368).

Almost surely, 2^85819986 is an apocalyptic number.

85819986 is an abundant number, since it is smaller than the sum of its proper divisors (133954734).

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

85819986 is a wasteful number, since it uses less digits than its factorization.

85819986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75700 (or 75691 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The square root of 85819986 is about 9263.9077067941. The cubic root of 85819986 is about 441.0923033225.

The spelling of 85819986 in words is "eighty-five million, eight hundred nineteen thousand, nine hundred eighty-six".