28681683 has 4 divisors (see below), whose sum is σ = 38242248. Its totient is φ = 19121120.

The previous prime is 28681663. The next prime is 28681687. The reversal of 28681683 is 38618682.

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 28681683 - 2⁶ = 28681619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28681687) 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, 4780278 + ... + 4780283.

It is an arithmetic number, because the mean of its divisors is an integer number (9560562).

Almost surely, 2^28681683 is an apocalyptic number.

28681683 is a deficient number, since it is larger than the sum of its proper divisors (9560565).

28681683 is an equidigital number, since it uses as much as digits as its factorization.

28681683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9560564.

The product of its digits is 110592, while the sum is 42.

The square root of 28681683 is about 5355.5282652601. The cubic root of 28681683 is about 306.1034401883.

The spelling of 28681683 in words is "twenty-eight million, six hundred eighty-one thousand, six hundred eighty-three".