28285514847 has 20 divisors (see below), whose sum is σ = 42663912720. Its totient is φ = 18673926624.

The previous prime is 28285514819. The next prime is 28285514867. The reversal of 28285514847 is 74841558282.

28285514847 is a `hidden beast` number, since 2 + 8 + 2 + 8 + 551 + 4 + 84 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-28285514847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28285514793 and 28285514802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28285514867) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1686822 + ... + 1703507.

It is an arithmetic number, because the mean of its divisors is an integer number (2133195636).

Almost surely, 2^28285514847 is an apocalyptic number.

28285514847 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28285514847 is a deficient number, since it is larger than the sum of its proper divisors (14378397873).

28285514847 is a wasteful number, since it uses less digits than its factorization.

28285514847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390444 (or 3390435 counting only the distinct ones).

The product of its digits is 5734400, while the sum is 54.

The spelling of 28285514847 in words is "twenty-eight billion, two hundred eighty-five million, five hundred fourteen thousand, eight hundred forty-seven".