28187217359 has 4 divisors (see below), whose sum is σ = 32213962704. Its totient is φ = 24160472016.

The previous prime is 28187217343. The next prime is 28187217361. The reversal of 28187217359 is 95371278182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95371278182 = 2 ⋅47685639091.

It is a cyclic number.

It is not a de Polignac number, because 28187217359 - 2⁴ = 28187217343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28187217359.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28187217559) 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, 2013372662 + ... + 2013372675.

It is an arithmetic number, because the mean of its divisors is an integer number (8053490676).

Almost surely, 2^28187217359 is an apocalyptic number.

28187217359 is a deficient number, since it is larger than the sum of its proper divisors (4026745345).

28187217359 is an equidigital number, since it uses as much as digits as its factorization.

28187217359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4026745344.

The product of its digits is 1693440, while the sum is 53.

The spelling of 28187217359 in words is "twenty-eight billion, one hundred eighty-seven million, two hundred seventeen thousand, three hundred fifty-nine".