28567789685 has 8 divisors (see below), whose sum is σ = 34764183936. Its totient is φ = 22532340880.

The previous prime is 28567789639. The next prime is 28567789721. The reversal of 28567789685 is 58698776582.

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

It is a de Polignac number, because none of the positive numbers 2^k-28567789685 is a prime.

It is a super-2 number, since 2×28567789685² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (71).

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 7 ways as a sum of consecutive naturals, for example, 40235969 + ... + 40236678.

It is an arithmetic number, because the mean of its divisors is an integer number (4345522992).

Almost surely, 2^28567789685 is an apocalyptic number.

It is an amenable number.

28567789685 is a deficient number, since it is larger than the sum of its proper divisors (6196394251).

28567789685 is an equidigital number, since it uses as much as digits as its factorization.

28567789685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80472723.

The product of its digits is 406425600, while the sum is 71.

The spelling of 28567789685 in words is "twenty-eight billion, five hundred sixty-seven million, seven hundred eighty-nine thousand, six hundred eighty-five".