28682819 has 4 divisors (see below), whose sum is σ = 31290360. Its totient is φ = 26075280.

The previous prime is 28682813. The next prime is 28682867. The reversal of 28682819 is 91828682.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28682819 - 2¹⁶ = 28617283 is a prime.

It is a super-2 number, since 2×28682819² = 1645408211573522, which contains 22 as substring.

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 28682819.

It is not an unprimeable number, because it can be changed into a prime (28682813) 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, 1303754 + ... + 1303775.

It is an arithmetic number, because the mean of its divisors is an integer number (7822590).

Almost surely, 2^28682819 is an apocalyptic number.

28682819 is a deficient number, since it is larger than the sum of its proper divisors (2607541).

28682819 is a wasteful number, since it uses less digits than its factorization.

28682819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2607540.

The product of its digits is 110592, while the sum is 44.

The square root of 28682819 is about 5355.6343228417. The cubic root of 28682819 is about 306.1074814309.

The spelling of 28682819 in words is "twenty-eight million, six hundred eighty-two thousand, eight hundred nineteen".