28297183 has 4 divisors (see below), whose sum is σ = 28308888. Its totient is φ = 28285480.

The previous prime is 28297169. The next prime is 28297201. The reversal of 28297183 is 38179282.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28297183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28297103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 733 + ... + 7558.

It is an arithmetic number, because the mean of its divisors is an integer number (7077222).

Almost surely, 2^28297183 is an apocalyptic number.

28297183 is a deficient number, since it is larger than the sum of its proper divisors (11705).

28297183 is an equidigital number, since it uses as much as digits as its factorization.

28297183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11704.

The product of its digits is 48384, while the sum is 40.

The square root of 28297183 is about 5319.5096578538. The cubic root of 28297183 is about 304.7294312819.

The spelling of 28297183 in words is "twenty-eight million, two hundred ninety-seven thousand, one hundred eighty-three".