16489861 has 8 divisors (see below), whose sum is σ = 17109248. Its totient is φ = 15876000.

The previous prime is 16489843. The next prime is 16489883. The reversal of 16489861 is 16898461.

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 16489861 - 2²³ = 8101253 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 (16489061) 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, 5281 + ... + 7801.

It is an arithmetic number, because the mean of its divisors is an integer number (2138656).

Almost surely, 2^16489861 is an apocalyptic number.

It is an amenable number.

16489861 is a deficient number, since it is larger than the sum of its proper divisors (619387).

16489861 is a wasteful number, since it uses less digits than its factorization.

16489861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763.

The product of its digits is 82944, while the sum is 43.

The square root of 16489861 is about 4060.7709859090. The cubic root of 16489861 is about 254.5300121700.

The spelling of 16489861 in words is "sixteen million, four hundred eighty-nine thousand, eight hundred sixty-one".