85155986 has 16 divisors (see below), whose sum is σ = 134719200. Its totient is φ = 40258368.

The previous prime is 85155979. The next prime is 85155989. The reversal of 85155986 is 68955158.

It is a self number, because there is not a number n which added to its sum of digits gives 85155986.

It is not an unprimeable number, because it can be changed into a prime (85155989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20645 + ... + 24423.

It is an arithmetic number, because the mean of its divisors is an integer number (8419950).

Almost surely, 2^85155986 is an apocalyptic number.

85155986 is a deficient number, since it is larger than the sum of its proper divisors (49563214).

85155986 is a wasteful number, since it uses less digits than its factorization.

85155986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4393.

The product of its digits is 432000, while the sum is 47.

The square root of 85155986 is about 9228.0001083658. Note that the first 3 decimals coincide. The cubic root of 85155986 is about 439.9517612405.

The spelling of 85155986 in words is "eighty-five million, one hundred fifty-five thousand, nine hundred eighty-six".