28097843 has 4 divisors (see below), whose sum is σ = 28126128. Its totient is φ = 28069560.

The previous prime is 28097813. The next prime is 28097921. The reversal of 28097843 is 34879082.

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 28097843 - 2⁶ = 28097779 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28097843.

It is not an unprimeable number, because it can be changed into a prime (28097813) 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, 12596 + ... + 14657.

It is an arithmetic number, because the mean of its divisors is an integer number (7031532).

Almost surely, 2^28097843 is an apocalyptic number.

28097843 is a deficient number, since it is larger than the sum of its proper divisors (28285).

28097843 is a wasteful number, since it uses less digits than its factorization.

28097843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28284.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 28097843 is about 5300.7398540204. The cubic root of 28097843 is about 304.0121871557.

The spelling of 28097843 in words is "twenty-eight million, ninety-seven thousand, eight hundred forty-three".