28016393 has 8 divisors (see below), whose sum is σ = 29541120. Its totient is φ = 26496720.

The previous prime is 28016377. The next prime is 28016411. The reversal of 28016393 is 39361082.

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 28016393 - 2⁴ = 28016377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28016333) 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, 17096 + ... + 18662.

It is an arithmetic number, because the mean of its divisors is an integer number (3692640).

Almost surely, 2^28016393 is an apocalyptic number.

It is an amenable number.

28016393 is a deficient number, since it is larger than the sum of its proper divisors (1524727).

28016393 is a wasteful number, since it uses less digits than its factorization.

28016393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2527.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 28016393 is about 5293.0513883770. The cubic root of 28016393 is about 303.7181461061.

The spelling of 28016393 in words is "twenty-eight million, sixteen thousand, three hundred ninety-three".