86181012 has 18 divisors (see below), whose sum is σ = 217846538. Its totient is φ = 28726992.

The previous prime is 86181001. The next prime is 86181019. The reversal of 86181012 is 21018168.

It can be written as a sum of positive squares in only one way, i.e., 74028816 + 12152196 = 8604^2 + 3486^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86181019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1196923 + ... + 1196994.

Almost surely, 2^86181012 is an apocalyptic number.

It is an amenable number.

86181012 is an abundant number, since it is smaller than the sum of its proper divisors (131665526).

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

86181012 is a wasteful number, since it uses less digits than its factorization.

86181012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2393927 (or 2393922 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 86181012 is about 9283.3728784316. The cubic root of 86181012 is about 441.7099644432.

The spelling of 86181012 in words is "eighty-six million, one hundred eighty-one thousand, twelve".