28286577565 has 8 divisors (see below), whose sum is σ = 34069148928. Its totient is φ = 22545758160.

The previous prime is 28286577547. The next prime is 28286577569. The reversal of 28286577565 is 56577568282.

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

It is not a de Polignac number, because 28286577565 - 2⁷ = 28286577437 is a prime.

It is a super-2 number, since 2×28286577565² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28286577569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10436497 + ... + 10439206.

It is an arithmetic number, because the mean of its divisors is an integer number (4258643616).

Almost surely, 2^28286577565 is an apocalyptic number.

It is an amenable number.

28286577565 is a deficient number, since it is larger than the sum of its proper divisors (5782571363).

28286577565 is a wasteful number, since it uses less digits than its factorization.

28286577565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20875979.

The product of its digits is 56448000, while the sum is 61.

The spelling of 28286577565 in words is "twenty-eight billion, two hundred eighty-six million, five hundred seventy-seven thousand, five hundred sixty-five".