16888891 has 8 divisors (see below), whose sum is σ = 18044480. Its totient is φ = 15760008.

The previous prime is 16888847. The next prime is 16888901. The reversal of 16888891 is 19888861.

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

It is not a de Polignac number, because 16888891 - 2¹¹ = 16886843 is a prime.

16888891 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16888801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5361 + ... + 7906.

It is an arithmetic number, because the mean of its divisors is an integer number (2255560).

Almost surely, 2^16888891 is an apocalyptic number.

16888891 is a deficient number, since it is larger than the sum of its proper divisors (1155589).

16888891 is a wasteful number, since it uses less digits than its factorization.

16888891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13353.

The product of its digits is 221184, while the sum is 49.

The square root of 16888891 is about 4109.6095921632. The cubic root of 16888891 is about 256.5667527754.

The spelling of 16888891 in words is "sixteen million, eight hundred eighty-eight thousand, eight hundred ninety-one".