28427803 has 4 divisors (see below), whose sum is σ = 29196160. Its totient is φ = 27659448.

The previous prime is 28427797. The next prime is 28427813. The reversal of 28427803 is 30872482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30872482 = 2 ⋅15436241.

It is a cyclic number.

It is not a de Polignac number, because 28427803 - 2⁵ = 28427771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28427813) 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, 384123 + ... + 384196.

It is an arithmetic number, because the mean of its divisors is an integer number (7299040).

Almost surely, 2^28427803 is an apocalyptic number.

28427803 is a deficient number, since it is larger than the sum of its proper divisors (768357).

28427803 is an equidigital number, since it uses as much as digits as its factorization.

28427803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768356.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 28427803 is about 5331.7729696603. The cubic root of 28427803 is about 305.1975894266.

The spelling of 28427803 in words is "twenty-eight million, four hundred twenty-seven thousand, eight hundred three".