28768732992 has 84 divisors (see below), whose sum is σ = 82498118976. Its totient is φ = 9585189120.

The previous prime is 28768732991. The next prime is 28768732997. The reversal of 28768732992 is 29923786782.

28768732992 is a `hidden beast` number, since 287 + 68 + 7 + 3 + 299 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28768732991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1399267 + ... + 1419677.

It is an arithmetic number, because the mean of its divisors is an integer number (982120464).

Almost surely, 2^28768732992 is an apocalyptic number.

It is an amenable number.

28768732992 is an abundant number, since it is smaller than the sum of its proper divisors (53729385984).

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

28768732992 is a wasteful number, since it uses less digits than its factorization.

28768732992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22876 (or 22863 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 63.

The spelling of 28768732992 in words is "twenty-eight billion, seven hundred sixty-eight million, seven hundred thirty-two thousand, nine hundred ninety-two".