28663873756 has 12 divisors (see below), whose sum is σ = 57327747568. Its totient is φ = 12284517312.

The previous prime is 28663873703. The next prime is 28663873781. The reversal of 28663873756 is 65737836682.

28663873756 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 28663873694 and 28663873703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511854861 + ... + 511854916.

Almost surely, 2^28663873756 is an apocalyptic number.

It is an amenable number.

28663873756 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28663873756 is a wasteful number, since it uses less digits than its factorization.

28663873756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023709788 (or 1023709786 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 61.

The spelling of 28663873756 in words is "twenty-eight billion, six hundred sixty-three million, eight hundred seventy-three thousand, seven hundred fifty-six".