28319827 has 4 divisors (see below), whose sum is σ = 28438560. Its totient is φ = 28201096.

The previous prime is 28319821. The next prime is 28319867. The reversal of 28319827 is 72891382.

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 28319827 - 2¹⁵ = 28287059 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 28319827.

It is not an unprimeable number, because it can be changed into a prime (28319821) 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, 59008 + ... + 59485.

It is an arithmetic number, because the mean of its divisors is an integer number (7109640).

Almost surely, 2^28319827 is an apocalyptic number.

28319827 is a deficient number, since it is larger than the sum of its proper divisors (118733).

28319827 is a wasteful number, since it uses less digits than its factorization.

28319827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118732.

The product of its digits is 48384, while the sum is 40.

The square root of 28319827 is about 5321.6376238898. The cubic root of 28319827 is about 304.8106932398.

The spelling of 28319827 in words is "twenty-eight million, three hundred nineteen thousand, eight hundred twenty-seven".