28331248185 has 12 divisors (see below), whose sum is σ = 49107496932. Its totient is φ = 15109999008.

The previous prime is 28331248181. The next prime is 28331248193. The reversal of 28331248185 is 58184213382.

28331248185 is a `hidden beast` number, since 2 + 83 + 3 + 12 + 481 + 85 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3084580521 + 25246667664 = 55539^2 + 158892^2 .

It is not a de Polignac number, because 28331248185 - 2² = 28331248181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 629583293 = 28331248185 / (2 + 8 + 3 + 3 + 1 + 2 + 4 + 8 + 1 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 28331248185.

It is not an unprimeable number, because it can be changed into a prime (28331248181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 314791602 + ... + 314791691.

It is an arithmetic number, because the mean of its divisors is an integer number (4092291411).

Almost surely, 2^28331248185 is an apocalyptic number.

It is an amenable number.

28331248185 is a deficient number, since it is larger than the sum of its proper divisors (20776248747).

28331248185 is a wasteful number, since it uses less digits than its factorization.

28331248185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629583304 (or 629583301 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The spelling of 28331248185 in words is "twenty-eight billion, three hundred thirty-one million, two hundred forty-eight thousand, one hundred eighty-five".