28233219 has 24 divisors (see below), whose sum is σ = 44486400. Its totient is φ = 15601680.

The previous prime is 28233217. The next prime is 28233223. The reversal of 28233219 is 91233282.

It is a happy number.

It is not a de Polignac number, because 28233219 - 2¹ = 28233217 is a prime.

It is a super-2 number, since 2×28233219² = 1594229310203922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28233217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19482 + ... + 20880.

It is an arithmetic number, because the mean of its divisors is an integer number (1853600).

Almost surely, 2^28233219 is an apocalyptic number.

28233219 is a deficient number, since it is larger than the sum of its proper divisors (16253181).

28233219 is a wasteful number, since it uses less digits than its factorization.

28233219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471 (or 1440 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 28233219 is about 5313.4940481758. The cubic root of 28233219 is about 304.4996508310.

The spelling of 28233219 in words is "twenty-eight million, two hundred thirty-three thousand, two hundred nineteen".