86645444 has 12 divisors (see below), whose sum is σ = 153193404. Its totient is φ = 42875904.

The previous prime is 86645441. The next prime is 86645459. The reversal of 86645444 is 44454668.

It can be written as a sum of positive squares in 2 ways, for example, as 69089344 + 17556100 = 8312^2 + 4190^2 .

It is not an unprimeable number, because it can be changed into a prime (86645441) 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 3 ways as a sum of consecutive naturals, for example, 111269 + ... + 112044.

It is an arithmetic number, because the mean of its divisors is an integer number (12766117).

Almost surely, 2^86645444 is an apocalyptic number.

It is an amenable number.

86645444 is a deficient number, since it is larger than the sum of its proper divisors (66547960).

86645444 is a wasteful number, since it uses less digits than its factorization.

86645444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223414 (or 223412 counting only the distinct ones).

The product of its digits is 368640, while the sum is 41.

The square root of 86645444 is about 9308.3534526789. The cubic root of 86645444 is about 442.5020060130.

The spelling of 86645444 in words is "eighty-six million, six hundred forty-five thousand, four hundred forty-four".