28668883 has 4 divisors (see below), whose sum is σ = 28693440. Its totient is φ = 28644328.

The previous prime is 28668859. The next prime is 28668931. The reversal of 28668883 is 38886682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38886682 = 2 ⋅19443341.

It is a cyclic number.

It is not a de Polignac number, because 28668883 - 2⁹ = 28668371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28668803) 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, 10435 + ... + 12892.

It is an arithmetic number, because the mean of its divisors is an integer number (7173360).

Almost surely, 2^28668883 is an apocalyptic number.

28668883 is a deficient number, since it is larger than the sum of its proper divisors (24557).

28668883 is a wasteful number, since it uses less digits than its factorization.

28668883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24556.

The product of its digits is 884736, while the sum is 49.

The square root of 28668883 is about 5354.3331050655. Note that the first 3 decimals coincide. The cubic root of 28668883 is about 306.0578976837.

It can be divided in two parts, 286 and 68883, that added together give a square (69169 = 263²).

The spelling of 28668883 in words is "twenty-eight million, six hundred sixty-eight thousand, eight hundred eighty-three".