28684408 has 16 divisors (see below), whose sum is σ = 53943480. Its totient is φ = 14299488.

The previous prime is 28684387. The next prime is 28684417. The reversal of 28684408 is 80448682.

It is a congruent number.

It is an unprimeable number.

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, 2391 + ... + 7942.

Almost surely, 2^28684408 is an apocalyptic number.

It is an amenable number.

28684408 is a deficient number, since it is larger than the sum of its proper divisors (25259072).

28684408 is a wasteful number, since it uses less digits than its factorization.

28684408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10686 (or 10682 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 40.

The square root of 28684408 is about 5355.7826692277. The cubic root of 28684408 is about 306.1131340111.

It can be divided in two parts, 28684 and 408, that added together give a palindrome (29092).

The spelling of 28684408 in words is "twenty-eight million, six hundred eighty-four thousand, four hundred eight".