28588591 has 2 divisors, whose sum is σ = 28588592. Its totient is φ = 28588590.

The previous prime is 28588583. The next prime is 28588621. The reversal of 28588591 is 19588582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28588591 - 2³ = 28588583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28588291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14294295 + 14294296.

It is an arithmetic number, because the mean of its divisors is an integer number (14294296).

Almost surely, 2^28588591 is an apocalyptic number.

28588591 is a deficient number, since it is larger than the sum of its proper divisors (1).

28588591 is an equidigital number, since it uses as much as digits as its factorization.

28588591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 46.

The square root of 28588591 is about 5346.8299954272. The cubic root of 28588591 is about 305.7719084263.

Subtracting from 28588591 its reverse (19588582), we obtain a palindrome (9000009).

It can be divided in two parts, 2858 and 8591, that added together give a square (11449 = 107²).

The spelling of 28588591 in words is "twenty-eight million, five hundred eighty-eight thousand, five hundred ninety-one".