28366849 has 4 divisors (see below), whose sum is σ = 32419264. Its totient is φ = 24314436.

The previous prime is 28366831. The next prime is 28366883. The reversal of 28366849 is 94866382.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28366849 - 2⁵ = 28366817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28366799 and 28366808.

It is not an unprimeable number, because it can be changed into a prime (28366049) 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, 2026197 + ... + 2026210.

It is an arithmetic number, because the mean of its divisors is an integer number (8104816).

Almost surely, 2^28366849 is an apocalyptic number.

It is an amenable number.

28366849 is a deficient number, since it is larger than the sum of its proper divisors (4052415).

28366849 is an equidigital number, since it uses as much as digits as its factorization.

28366849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4052414.

The product of its digits is 497664, while the sum is 46.

The square root of 28366849 is about 5326.0537924433. The cubic root of 28366849 is about 304.9793016501.

The spelling of 28366849 in words is "twenty-eight million, three hundred sixty-six thousand, eight hundred forty-nine".