28016855 has 8 divisors (see below), whose sum is σ = 33752592. Its totient is φ = 22325248.

The previous prime is 28016851. The next prime is 28016893. The reversal of 28016855 is 55861082.

It is a happy number.

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 28016855 - 2² = 28016851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28016851) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9617 + ... + 12186.

It is an arithmetic number, because the mean of its divisors is an integer number (4219074).

Almost surely, 2^28016855 is an apocalyptic number.

28016855 is a deficient number, since it is larger than the sum of its proper divisors (5735737).

28016855 is a wasteful number, since it uses less digits than its factorization.

28016855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22065.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 28016855 is about 5293.0950303202. The cubic root of 28016855 is about 303.7198155694.

The spelling of 28016855 in words is "twenty-eight million, sixteen thousand, eight hundred fifty-five".