28809718056 has 96 divisors (see below), whose sum is σ = 90394599360. Its totient is φ = 8118579456.

The previous prime is 28809718043. The next prime is 28809718057. The reversal of 28809718056 is 65081790882.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28809717993 and 28809718011.

It is not an unprimeable number, because it can be changed into a prime (28809718057) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 354730 + ... + 428313.

It is an arithmetic number, because the mean of its divisors is an integer number (941610410).

Almost surely, 2^28809718056 is an apocalyptic number.

It is an amenable number.

28809718056 is an abundant number, since it is smaller than the sum of its proper divisors (61584881304).

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

28809718056 is a wasteful number, since it uses less digits than its factorization.

28809718056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783135 (or 783128 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

It can be divided in two parts, 288097 and 18056, that added together give a triangular number (306153 = T₇₈₂).

The spelling of 28809718056 in words is "twenty-eight billion, eight hundred nine million, seven hundred eighteen thousand, fifty-six".