86815485 has 24 divisors (see below), whose sum is σ = 152039160. Its totient is φ = 45821952.

The previous prime is 86815471. The next prime is 86815489. The reversal of 86815485 is 58451868.

It can be written as a sum of positive squares in 4 ways, for example, as 25130169 + 61685316 = 5013^2 + 7854^2 .

It is not a de Polignac number, because 86815485 - 2⁸ = 86815229 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 86815485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86815489) 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, 5580 + ... + 14309.

It is an arithmetic number, because the mean of its divisors is an integer number (6334965).

Almost surely, 2^86815485 is an apocalyptic number.

It is an amenable number.

86815485 is a deficient number, since it is larger than the sum of its proper divisors (65223675).

86815485 is a wasteful number, since it uses less digits than its factorization.

86815485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19997 (or 19994 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 86815485 is about 9317.4827609178. The cubic root of 86815485 is about 442.7912857572.

The spelling of 86815485 in words is "eighty-six million, eight hundred fifteen thousand, four hundred eighty-five".