28286874408 has 32 divisors (see below), whose sum is σ = 76156970400. Its totient is φ = 8703653568.

The previous prime is 28286874373. The next prime is 28286874439. The reversal of 28286874408 is 80447868282.

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, 45331218 + ... + 45331841.

It is an arithmetic number, because the mean of its divisors is an integer number (2379905325).

Almost surely, 2^28286874408 is an apocalyptic number.

It is an amenable number.

28286874408 is an abundant number, since it is smaller than the sum of its proper divisors (47870095992).

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

28286874408 is a wasteful number, since it uses less digits than its factorization.

28286874408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90663081 (or 90663077 counting only the distinct ones).

The product of its (nonzero) digits is 11010048, while the sum is 57.

The spelling of 28286874408 in words is "twenty-eight billion, two hundred eighty-six million, eight hundred seventy-four thousand, four hundred eight".