28686373 has 4 divisors (see below), whose sum is σ = 28712448. Its totient is φ = 28660300.

The previous prime is 28686367. The next prime is 28686407. The reversal of 28686373 is 37368682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28686373 - 2¹⁷ = 28555301 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 (28686173) 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, 11311 + ... + 13612.

It is an arithmetic number, because the mean of its divisors is an integer number (7178112).

Almost surely, 2^28686373 is an apocalyptic number.

It is an amenable number.

28686373 is a deficient number, since it is larger than the sum of its proper divisors (26075).

28686373 is a wasteful number, since it uses less digits than its factorization.

28686373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26074.

The product of its digits is 290304, while the sum is 43.

The square root of 28686373 is about 5355.9661126635. The cubic root of 28686373 is about 306.1201238547.

The spelling of 28686373 in words is "twenty-eight million, six hundred eighty-six thousand, three hundred seventy-three".