28395294685 has 4 divisors (see below), whose sum is σ = 34074353628. Its totient is φ = 22716235744.

The previous prime is 28395294673. The next prime is 28395294703. The reversal of 28395294685 is 58649259382.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8843145444 + 19552149241 = 94038^2 + 139829^2 .

It is a cyclic number.

It is not a de Polignac number, because 28395294685 - 2²⁹ = 27858423773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2839529464 + ... + 2839529473.

It is an arithmetic number, because the mean of its divisors is an integer number (8518588407).

Almost surely, 2^28395294685 is an apocalyptic number.

It is an amenable number.

28395294685 is a deficient number, since it is larger than the sum of its proper divisors (5679058943).

28395294685 is an equidigital number, since it uses as much as digits as its factorization.

28395294685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5679058942.

The product of its digits is 37324800, while the sum is 61.

The spelling of 28395294685 in words is "twenty-eight billion, three hundred ninety-five million, two hundred ninety-four thousand, six hundred eighty-five".