86444181 has 6 divisors (see below), whose sum is σ = 124863830. Its totient is φ = 57629448.

The previous prime is 86444179. The next prime is 86444227. The reversal of 86444181 is 18144468.

86444181 is a `hidden beast` number, since 8 + 644 + 4 + 1 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 50552100 + 35892081 = 7110^2 + 5991^2 .

It is not a de Polignac number, because 86444181 - 2¹ = 86444179 is a prime.

It is a super-2 number, since 2×86444181² = 14945192857521522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86444131) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 4802446 + ... + 4802463.

Almost surely, 2^86444181 is an apocalyptic number.

It is an amenable number.

86444181 is a deficient number, since it is larger than the sum of its proper divisors (38419649).

86444181 is a wasteful number, since it uses less digits than its factorization.

86444181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9604915 (or 9604912 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 86444181 is about 9297.5362865654. The cubic root of 86444181 is about 442.1591207906.

The spelling of 86444181 in words is "eighty-six million, four hundred forty-four thousand, one hundred eighty-one".