28282591 has 2 divisors, whose sum is σ = 28282592. Its totient is φ = 28282590.

The previous prime is 28282567. The next prime is 28282601. The reversal of 28282591 is 19528282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28282591 - 2¹⁹ = 27758303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28282591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28282291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14141295 + 14141296.

It is an arithmetic number, because the mean of its divisors is an integer number (14141296).

Almost surely, 2^28282591 is an apocalyptic number.

28282591 is a deficient number, since it is larger than the sum of its proper divisors (1).

28282591 is an equidigital number, since it uses as much as digits as its factorization.

28282591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 37.

The square root of 28282591 is about 5318.1379260038. The cubic root of 28282591 is about 304.6770423638.

The spelling of 28282591 in words is "twenty-eight million, two hundred eighty-two thousand, five hundred ninety-one".