28259633 has 4 divisors (see below), whose sum is σ = 28657728. Its totient is φ = 27861540.

The previous prime is 28259603. The next prime is 28259677. The reversal of 28259633 is 33695282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28259633 - 2²² = 24065329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28259603) 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, 198941 + ... + 199082.

It is an arithmetic number, because the mean of its divisors is an integer number (7164432).

Almost surely, 2^28259633 is an apocalyptic number.

It is an amenable number.

28259633 is a deficient number, since it is larger than the sum of its proper divisors (398095).

28259633 is an equidigital number, since it uses as much as digits as its factorization.

28259633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398094.

The product of its digits is 77760, while the sum is 38.

The square root of 28259633 is about 5315.9790255418. The cubic root of 28259633 is about 304.5945809299.

The spelling of 28259633 in words is "twenty-eight million, two hundred fifty-nine thousand, six hundred thirty-three".