28697886792 has 64 divisors (see below), whose sum is σ = 81412473600. Its totient is φ = 9362427840.

The previous prime is 28697886751. The next prime is 28697886797. The reversal of 28697886792 is 29768879682.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 28697886792.

It is not an unprimeable number, because it can be changed into a prime (28697886797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1403259 + ... + 1423562.

It is an arithmetic number, because the mean of its divisors is an integer number (1272069900).

Almost surely, 2^28697886792 is an apocalyptic number.

It is an amenable number.

28697886792 is an abundant number, since it is smaller than the sum of its proper divisors (52714586808).

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

28697886792 is a wasteful number, since it uses less digits than its factorization.

28697886792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2826883 (or 2826873 counting only the distinct ones).

The product of its digits is 292626432, while the sum is 72.

The spelling of 28697886792 in words is "twenty-eight billion, six hundred ninety-seven million, eight hundred eighty-six thousand, seven hundred ninety-two".