28683867 has 4 divisors (see below), whose sum is σ = 38245160. Its totient is φ = 19122576.

The previous prime is 28683833. The next prime is 28683877. The reversal of 28683867 is 76838682.

It is a happy number.

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

It is not a de Polignac number, because 28683867 - 2⁶ = 28683803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28683877) 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, 4780642 + ... + 4780647.

It is an arithmetic number, because the mean of its divisors is an integer number (9561290).

Almost surely, 2^28683867 is an apocalyptic number.

28683867 is a deficient number, since it is larger than the sum of its proper divisors (9561293).

28683867 is an equidigital number, since it uses as much as digits as its factorization.

28683867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9561292.

The product of its digits is 774144, while the sum is 48.

The square root of 28683867 is about 5355.7321628326. The cubic root of 28683867 is about 306.1112095248. Note that the first 3 decimals are identical.

The spelling of 28683867 in words is "twenty-eight million, six hundred eighty-three thousand, eight hundred sixty-seven".