85981266 has 48 divisors (see below), whose sum is σ = 218672064. Its totient is φ = 23900832.

The previous prime is 85981261. The next prime is 85981267. The reversal of 85981266 is 66218958.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (85981261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4560 + ... + 13883.

It is an arithmetic number, because the mean of its divisors is an integer number (4555668).

Almost surely, 2^85981266 is an apocalyptic number.

85981266 is an abundant number, since it is smaller than the sum of its proper divisors (132690798).

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

85981266 is a wasteful number, since it uses less digits than its factorization.

85981266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18495 (or 18492 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 85981266 is about 9272.6083708954. The cubic root of 85981266 is about 441.3684427659.

The spelling of 85981266 in words is "eighty-five million, nine hundred eighty-one thousand, two hundred sixty-six".