16855289 has 8 divisors (see below), whose sum is σ = 18981120. Its totient is φ = 14828400.

The previous prime is 16855283. The next prime is 16855291. The reversal of 16855289 is 98255861.

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 16855289 - 2⁴ = 16855273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16855283) 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, 24374 + ... + 25055.

It is an arithmetic number, because the mean of its divisors is an integer number (2372640).

Almost surely, 2^16855289 is an apocalyptic number.

It is an amenable number.

16855289 is a deficient number, since it is larger than the sum of its proper divisors (2125831).

16855289 is a wasteful number, since it uses less digits than its factorization.

16855289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49471.

The product of its digits is 172800, while the sum is 44.

The square root of 16855289 is about 4105.5193337750. The cubic root of 16855289 is about 256.3964854306.

The spelling of 16855289 in words is "sixteen million, eight hundred fifty-five thousand, two hundred eighty-nine".