28567884257 has 12 divisors (see below), whose sum is σ = 31843340928. Its totient is φ = 25605010200.

The previous prime is 28567884251. The next prime is 28567884259. The reversal of 28567884257 is 75248876582.

It is not a de Polignac number, because 28567884257 - 2¹⁸ = 28567622113 is a prime.

It is a super-2 number, since 2×28567884257² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28567884257.

It is not an unprimeable number, because it can be changed into a prime (28567884251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1654073 + ... + 1671254.

It is an arithmetic number, because the mean of its divisors is an integer number (2653611744).

Almost surely, 2^28567884257 is an apocalyptic number.

It is an amenable number.

28567884257 is a deficient number, since it is larger than the sum of its proper divisors (3275456671).

28567884257 is a wasteful number, since it uses less digits than its factorization.

28567884257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325420 (or 3325409 counting only the distinct ones).

The product of its digits is 60211200, while the sum is 62.

The spelling of 28567884257 in words is "twenty-eight billion, five hundred sixty-seven million, eight hundred eighty-four thousand, two hundred fifty-seven".