86443785 has 24 divisors (see below), whose sum is σ = 153493704. Its totient is φ = 44977920.

The previous prime is 86443783. The next prime is 86443801. The reversal of 86443785 is 58734468.

It can be written as a sum of positive squares in 4 ways, for example, as 121104 + 86322681 = 348^2 + 9291^2 .

It is not a de Polignac number, because 86443785 - 2¹ = 86443783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 86443785.

It is not an unprimeable number, because it can be changed into a prime (86443783) 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 23 ways as a sum of consecutive naturals, for example, 21582 + ... + 25271.

It is an arithmetic number, because the mean of its divisors is an integer number (6395571).

Almost surely, 2^86443785 is an apocalyptic number.

It is an amenable number.

86443785 is a deficient number, since it is larger than the sum of its proper divisors (67049919).

86443785 is a wasteful number, since it uses less digits than its factorization.

86443785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46905 (or 46902 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 86443785 is about 9297.5149905768. The cubic root of 86443785 is about 442.1584456140.

The spelling of 86443785 in words is "eighty-six million, four hundred forty-three thousand, seven hundred eighty-five".