28245859 has 4 divisors (see below), whose sum is σ = 28643760. Its totient is φ = 27847960.

The previous prime is 28245829. The next prime is 28245871. The reversal of 28245859 is 95854282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95854282 = 2 ⋅47927141.

It is a cyclic number.

It is not a de Polignac number, because 28245859 - 2¹¹ = 28243811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28245809) 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, 198844 + ... + 198985.

It is an arithmetic number, because the mean of its divisors is an integer number (7160940).

Almost surely, 2^28245859 is an apocalyptic number.

28245859 is a deficient number, since it is larger than the sum of its proper divisors (397901).

28245859 is an equidigital number, since it uses as much as digits as its factorization.

28245859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397900.

The product of its digits is 230400, while the sum is 43.

The square root of 28245859 is about 5314.6833395791. The cubic root of 28245859 is about 304.5450855055.

The spelling of 28245859 in words is "twenty-eight million, two hundred forty-five thousand, eight hundred fifty-nine".