28251945168 has 40 divisors (see below), whose sum is σ = 72997717728. Its totient is φ = 9415569792.

The previous prime is 28251945121. The next prime is 28251945179. The reversal of 28251945168 is 86154915282.

It is a self number, because there is not a number n which added to its sum of digits gives 28251945168.

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, 221571 + ... + 324957.

Almost surely, 2^28251945168 is an apocalyptic number.

It is an amenable number.

28251945168 is an abundant number, since it is smaller than the sum of its proper divisors (44745772560).

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

28251945168 is a wasteful number, since it uses less digits than its factorization.

28251945168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109091 (or 109085 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 51.

The spelling of 28251945168 in words is "twenty-eight billion, two hundred fifty-one million, nine hundred forty-five thousand, one hundred sixty-eight".