28555567284 has 24 divisors (see below), whose sum is σ = 70549049088. Its totient is φ = 8958609280.

The previous prime is 28555567253. The next prime is 28555567297. The reversal of 28555567284 is 48276555582.

It is a super-2 number, since 2×28555567284² (a number of 22 digits) contains 22 as substring.

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, 69988932 + ... + 69989339.

It is an arithmetic number, because the mean of its divisors is an integer number (2939543712).

Almost surely, 2^28555567284 is an apocalyptic number.

It is an amenable number.

28555567284 is an abundant number, since it is smaller than the sum of its proper divisors (41993481804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28555567284 is a wasteful number, since it uses less digits than its factorization.

28555567284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139978295 (or 139978293 counting only the distinct ones).

The product of its digits is 26880000, while the sum is 57.

The spelling of 28555567284 in words is "twenty-eight billion, five hundred fifty-five million, five hundred sixty-seven thousand, two hundred eighty-four".