28847233 has 4 divisors (see below), whose sum is σ = 28863828. Its totient is φ = 28830640.

The previous prime is 28847219. The next prime is 28847243. The reversal of 28847233 is 33274882.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1723969 + 27123264 = 1313^2 + 5208^2 .

It is a cyclic number.

It is not a de Polignac number, because 28847233 - 2⁹ = 28846721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28847192 and 28847201.

It is not an unprimeable number, because it can be changed into a prime (28847213) 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, 5338 + ... + 9283.

It is an arithmetic number, because the mean of its divisors is an integer number (7215957).

Almost surely, 2^28847233 is an apocalyptic number.

It is an amenable number.

28847233 is a deficient number, since it is larger than the sum of its proper divisors (16595).

28847233 is a wasteful number, since it uses less digits than its factorization.

28847233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16594.

The product of its digits is 64512, while the sum is 37.

The square root of 28847233 is about 5370.9620181118. The cubic root of 28847233 is about 306.6912513109.

The spelling of 28847233 in words is "twenty-eight million, eight hundred forty-seven thousand, two hundred thirty-three".