28673259 has 4 divisors (see below), whose sum is σ = 38231016. Its totient is φ = 19115504.

The previous prime is 28673251. The next prime is 28673269. The reversal of 28673259 is 95237682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28673259 - 2³ = 28673251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28673259.

It is not an unprimeable number, because it can be changed into a prime (28673251) 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, 4778874 + ... + 4778879.

It is an arithmetic number, because the mean of its divisors is an integer number (9557754).

Almost surely, 2^28673259 is an apocalyptic number.

28673259 is a deficient number, since it is larger than the sum of its proper divisors (9557757).

28673259 is an equidigital number, since it uses as much as digits as its factorization.

28673259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9557756.

The product of its digits is 181440, while the sum is 42.

The square root of 28673259 is about 5354.7417304666. The cubic root of 28673259 is about 306.0734690522.

The spelling of 28673259 in words is "twenty-eight million, six hundred seventy-three thousand, two hundred fifty-nine".