28799167685 has 4 divisors (see below), whose sum is σ = 34559001228. Its totient is φ = 23039334144.

The previous prime is 28799167589. The next prime is 28799167693. The reversal of 28799167685 is 58676199782.

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 4387605121 + 24411562564 = 66239^2 + 156242^2 .

It is a cyclic number.

It is not a de Polignac number, because 28799167685 - 2¹⁰ = 28799166661 is a prime.

It is a Duffinian number.

It is a Curzon 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, 2879916764 + ... + 2879916773.

It is an arithmetic number, because the mean of its divisors is an integer number (8639750307).

Almost surely, 2^28799167685 is an apocalyptic number.

It is an amenable number.

28799167685 is a deficient number, since it is larger than the sum of its proper divisors (5759833543).

28799167685 is an equidigital number, since it uses as much as digits as its factorization.

28799167685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5759833542.

The product of its digits is 91445760, while the sum is 68.

The spelling of 28799167685 in words is "twenty-eight billion, seven hundred ninety-nine million, one hundred sixty-seven thousand, six hundred eighty-five".