28249043 has 4 divisors (see below), whose sum is σ = 28260408. Its totient is φ = 28237680.

The previous prime is 28249031. The next prime is 28249049. The reversal of 28249043 is 34094282.

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 not a de Polignac number, because 28249043 - 2⁴ = 28249027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28249049) 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, 173 + ... + 7518.

It is an arithmetic number, because the mean of its divisors is an integer number (7065102).

Almost surely, 2^28249043 is an apocalyptic number.

28249043 is a deficient number, since it is larger than the sum of its proper divisors (11365).

28249043 is an equidigital number, since it uses as much as digits as its factorization.

28249043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11364.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 28249043 is about 5314.9828786178. The cubic root of 28249043 is about 304.5565283052.

The spelling of 28249043 in words is "twenty-eight million, two hundred forty-nine thousand, forty-three".