28806280560 has 80 divisors (see below), whose sum is σ = 99221640480. Its totient is φ = 7681674240.

The previous prime is 28806280553. The next prime is 28806280561. The reversal of 28806280560 is 6508260882.

28806280560 is a `hidden beast` number, since 2 + 8 + 8 + 0 + 6 + 2 + 80 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28806280561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6665961 + ... + 6670280.

It is an arithmetic number, because the mean of its divisors is an integer number (1240270506).

Almost surely, 2^28806280560 is an apocalyptic number.

28806280560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28806280560 is an abundant number, since it is smaller than the sum of its proper divisors (70415359920).

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

28806280560 is a wasteful number, since it uses less digits than its factorization.

28806280560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13336263 (or 13336251 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 28806280560 in words is "twenty-eight billion, eight hundred six million, two hundred eighty thousand, five hundred sixty".