28030843 has 4 divisors (see below), whose sum is σ = 28368648. Its totient is φ = 27693040.

The previous prime is 28030837. The next prime is 28030853. The reversal of 28030843 is 34803082.

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 28030843 - 2⁵ = 28030811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28030823) 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, 168778 + ... + 168943.

It is an arithmetic number, because the mean of its divisors is an integer number (7092162).

Almost surely, 2^28030843 is an apocalyptic number.

28030843 is a deficient number, since it is larger than the sum of its proper divisors (337805).

28030843 is an equidigital number, since it uses as much as digits as its factorization.

28030843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337804.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 28030843 is about 5294.4162095551. The cubic root of 28030843 is about 303.7703533133.

The spelling of 28030843 in words is "twenty-eight million, thirty thousand, eight hundred forty-three".