28079243 has 4 divisors (see below), whose sum is σ = 28095600. Its totient is φ = 28062888.

The previous prime is 28079239. The next prime is 28079267. The reversal of 28079243 is 34297082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28079243 - 2² = 28079239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28079203) 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 3 ways as a sum of consecutive naturals, for example, 5255 + ... + 9152.

It is an arithmetic number, because the mean of its divisors is an integer number (7023900).

Almost surely, 2^28079243 is an apocalyptic number.

28079243 is a deficient number, since it is larger than the sum of its proper divisors (16357).

28079243 is a wasteful number, since it uses less digits than its factorization.

28079243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16356.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 28079243 is about 5298.9850915057. The cubic root of 28079243 is about 303.9450897765.

The spelling of 28079243 in words is "twenty-eight million, seventy-nine thousand, two hundred forty-three".