28233193 has 4 divisors (see below), whose sum is σ = 28256580. Its totient is φ = 28209808.

The previous prime is 28233173. The next prime is 28233199. The reversal of 28233193 is 39133282.

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 10323369 + 17909824 = 3213^2 + 4232^2 .

It is a cyclic number.

It is not a de Polignac number, because 28233193 - 2²¹ = 26136041 is a prime.

It is a super-2 number, since 2×28233193² = 1594226373950498, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28233199) 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, 9778 + ... + 12331.

It is an arithmetic number, because the mean of its divisors is an integer number (7064145).

Almost surely, 2^28233193 is an apocalyptic number.

It is an amenable number.

28233193 is a deficient number, since it is larger than the sum of its proper divisors (23387).

28233193 is a wasteful number, since it uses less digits than its factorization.

28233193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23386.

The product of its digits is 7776, while the sum is 31.

The square root of 28233193 is about 5313.4916015742. The cubic root of 28233193 is about 304.4995573596.

The spelling of 28233193 in words is "twenty-eight million, two hundred thirty-three thousand, one hundred ninety-three".