28358833 has 4 divisors (see below), whose sum is σ = 28428580. Its totient is φ = 28289088.

The previous prime is 28358809. The next prime is 28358851. The reversal of 28358833 is 33885382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33885382 = 2 ⋅16942691.

It can be written as a sum of positive squares in 2 ways, for example, as 21003889 + 7354944 = 4583^2 + 2712^2 .

It is a cyclic number.

It is not a de Polignac number, because 28358833 - 2⁹ = 28358321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28358633) 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, 34260 + ... + 35077.

It is an arithmetic number, because the mean of its divisors is an integer number (7107145).

Almost surely, 2^28358833 is an apocalyptic number.

It is an amenable number.

28358833 is a deficient number, since it is larger than the sum of its proper divisors (69747).

28358833 is an equidigital number, since it uses as much as digits as its factorization.

28358833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69746.

The product of its digits is 138240, while the sum is 40.

The square root of 28358833 is about 5325.3012121381. The cubic root of 28358833 is about 304.9505715833.

The spelling of 28358833 in words is "twenty-eight million, three hundred fifty-eight thousand, eight hundred thirty-three".