28684430 has 8 divisors (see below), whose sum is σ = 51631992. Its totient is φ = 11473768.

The previous prime is 28684417. The next prime is 28684511. The reversal of 28684430 is 3448682.

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

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, 1434212 + ... + 1434231.

It is an arithmetic number, because the mean of its divisors is an integer number (6453999).

Almost surely, 2^28684430 is an apocalyptic number.

28684430 is a deficient number, since it is larger than the sum of its proper divisors (22947562).

28684430 is a wasteful number, since it uses less digits than its factorization.

28684430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2868450.

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 28684430 is about 5355.7847230821. The cubic root of 28684430 is about 306.1132122707.

The spelling of 28684430 in words is "twenty-eight million, six hundred eighty-four thousand, four hundred thirty".