28247082591 has 16 divisors (see below), whose sum is σ = 46354187264. Its totient is φ = 14899559904.

The previous prime is 28247082559. The next prime is 28247082607. The reversal of 28247082591 is 19528074282.

It is not a de Polignac number, because 28247082591 - 2⁵ = 28247082559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28247082591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28247082191) 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, 51734311 + ... + 51734856.

It is an arithmetic number, because the mean of its divisors is an integer number (2897136704).

Almost surely, 2^28247082591 is an apocalyptic number.

28247082591 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28247082591 is a deficient number, since it is larger than the sum of its proper divisors (18107104673).

28247082591 is a wasteful number, since it uses less digits than its factorization.

28247082591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103469190.

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 28247082591 in words is "twenty-eight billion, two hundred forty-seven million, eighty-two thousand, five hundred ninety-one".