28318327685 has 8 divisors (see below), whose sum is σ = 34065081240. Its totient is φ = 22599270144.

The previous prime is 28318327663. The next prime is 28318327691. The reversal of 28318327685 is 58672381382.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5763694561 + 22554633124 = 75919^2 + 150182^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28318327685 - 2¹⁸ = 28318065541 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6921752 + ... + 6925841.

It is an arithmetic number, because the mean of its divisors is an integer number (4258135155).

Almost surely, 2^28318327685 is an apocalyptic number.

It is an amenable number.

28318327685 is a deficient number, since it is larger than the sum of its proper divisors (5746753555).

28318327685 is a wasteful number, since it uses less digits than its factorization.

28318327685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13848007.

The product of its digits is 3870720, while the sum is 53.

The spelling of 28318327685 in words is "twenty-eight billion, three hundred eighteen million, three hundred twenty-seven thousand, six hundred eighty-five".