28718392 has 16 divisors (see below), whose sum is σ = 53978400. Its totient is φ = 14324160.

The previous prime is 28718387. The next prime is 28718413. The reversal of 28718392 is 29381782.

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, 717 + ... + 7612.

It is an arithmetic number, because the mean of its divisors is an integer number (3373650).

Almost surely, 2^28718392 is an apocalyptic number.

It is an amenable number.

28718392 is a deficient number, since it is larger than the sum of its proper divisors (25260008).

28718392 is a wasteful number, since it uses less digits than its factorization.

28718392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8766 (or 8762 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 28718392 is about 5358.9543756222. The cubic root of 28718392 is about 306.2339760046.

The spelling of 28718392 in words is "twenty-eight million, seven hundred eighteen thousand, three hundred ninety-two".