28287014647 has 4 divisors (see below), whose sum is σ = 28685423376. Its totient is φ = 27888605920.

The previous prime is 28287014627. The next prime is 28287014677. The reversal of 28287014647 is 74641078282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28287014647 - 2²³ = 28278626039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28287014647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28287014627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199204258 + ... + 199204399.

It is an arithmetic number, because the mean of its divisors is an integer number (7171355844).

Almost surely, 2^28287014647 is an apocalyptic number.

28287014647 is a deficient number, since it is larger than the sum of its proper divisors (398408729).

28287014647 is an equidigital number, since it uses as much as digits as its factorization.

28287014647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398408728.

The product of its (nonzero) digits is 1204224, while the sum is 49.

The spelling of 28287014647 in words is "twenty-eight billion, two hundred eighty-seven million, fourteen thousand, six hundred forty-seven".