28280927 has 4 divisors (see below), whose sum is σ = 28346976. Its totient is φ = 28214880.

The previous prime is 28280921. The next prime is 28280929. The reversal of 28280927 is 72908282.

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 28280927 - 2²⁴ = 11503711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28280921) 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, 32378 + ... + 33239.

It is an arithmetic number, because the mean of its divisors is an integer number (7086744).

Almost surely, 2^28280927 is an apocalyptic number.

28280927 is a deficient number, since it is larger than the sum of its proper divisors (66049).

28280927 is an equidigital number, since it uses as much as digits as its factorization.

28280927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66048.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 28280927 is about 5317.9814779670. The cubic root of 28280927 is about 304.6710670445.

The spelling of 28280927 in words is "twenty-eight million, two hundred eighty thousand, nine hundred twenty-seven".