28301233 has 8 divisors (see below), whose sum is σ = 29285120. Its totient is φ = 27321840.

The previous prime is 28301213. The next prime is 28301249. The reversal of 28301233 is 33210382.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28301233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28301213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16123 + ... + 17791.

It is an arithmetic number, because the mean of its divisors is an integer number (3660640).

Almost surely, 2^28301233 is an apocalyptic number.

It is an amenable number.

28301233 is a deficient number, since it is larger than the sum of its proper divisors (983887).

28301233 is a wasteful number, since it uses less digits than its factorization.

28301233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2247.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 28301233 is about 5319.8903184182. The cubic root of 28301233 is about 304.7439685985.

The spelling of 28301233 in words is "twenty-eight million, three hundred one thousand, two hundred thirty-three".