28763117028 has 18 divisors (see below), whose sum is σ = 72706768134. Its totient is φ = 9587705664.

The previous prime is 28763116981. The next prime is 28763117041. The reversal of 28763117028 is 82071136782.

28763117028 is a `hidden beast` number, since 2 + 8 + 7 + 631 + 1 + 7 + 0 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19943653284 + 8819463744 = 141222^2 + 93912^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 399487701 + ... + 399487772.

Almost surely, 2^28763117028 is an apocalyptic number.

It is an amenable number.

28763117028 is an abundant number, since it is smaller than the sum of its proper divisors (43943651106).

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

28763117028 is a wasteful number, since it uses less digits than its factorization.

28763117028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798975483 (or 798975478 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 28763117028 in words is "twenty-eight billion, seven hundred sixty-three million, one hundred seventeen thousand, twenty-eight".