28216882768 has 40 divisors (see below), whose sum is σ = 56776652768. Its totient is φ = 13574639232.

The previous prime is 28216882739. The next prime is 28216882781. The reversal of 28216882768 is 86728861282.

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, 259971 + ... + 352162.

Almost surely, 2^28216882768 is an apocalyptic number.

It is an amenable number.

28216882768 is an abundant number, since it is smaller than the sum of its proper divisors (28559770000).

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

28216882768 is a wasteful number, since it uses less digits than its factorization.

28216882768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612251 (or 612245 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 58.

The spelling of 28216882768 in words is "twenty-eight billion, two hundred sixteen million, eight hundred eighty-two thousand, seven hundred sixty-eight".