28287351767 has 4 divisors (see below), whose sum is σ = 29262777720. Its totient is φ = 27311925816.

The previous prime is 28287351713. The next prime is 28287351779. The reversal of 28287351767 is 76715378282.

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 28287351767 - 2¹⁰ = 28287350743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28287351707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487712933 + ... + 487712990.

It is an arithmetic number, because the mean of its divisors is an integer number (7315694430).

Almost surely, 2^28287351767 is an apocalyptic number.

28287351767 is a deficient number, since it is larger than the sum of its proper divisors (975425953).

28287351767 is an equidigital number, since it uses as much as digits as its factorization.

28287351767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975425952.

The product of its digits is 7902720, while the sum is 56.

The spelling of 28287351767 in words is "twenty-eight billion, two hundred eighty-seven million, three hundred fifty-one thousand, seven hundred sixty-seven".