28684479 has 8 divisors (see below), whose sum is σ = 38292912. Its totient is φ = 19099520.

The previous prime is 28684417. The next prime is 28684511. The reversal of 28684479 is 97448682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28684479 - 2⁸ = 28684223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28684079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2784 + ... + 8069.

It is an arithmetic number, because the mean of its divisors is an integer number (4786614).

Almost surely, 2^28684479 is an apocalyptic number.

28684479 is a deficient number, since it is larger than the sum of its proper divisors (9608433).

28684479 is a wasteful number, since it uses less digits than its factorization.

28684479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11737.

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

The square root of 28684479 is about 5355.7892975732. The cubic root of 28684479 is about 306.1133865759.

The spelling of 28684479 in words is "twenty-eight million, six hundred eighty-four thousand, four hundred seventy-nine".