16220689 has 8 divisors (see below), whose sum is σ = 16750400. Its totient is φ = 15695856.

The previous prime is 16220683. The next prime is 16220713. The reversal of 16220689 is 98602261.

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 16220689 - 2⁹ = 16220177 is a prime.

It is a super-2 number, since 2×16220689² = 526221503269442, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (16220683) 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, 6262 + ... + 8464.

It is an arithmetic number, because the mean of its divisors is an integer number (2093800).

Almost surely, 2^16220689 is an apocalyptic number.

It is an amenable number.

16220689 is a deficient number, since it is larger than the sum of its proper divisors (529711).

16220689 is a wasteful number, since it uses less digits than its factorization.

16220689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 16220689 is about 4027.4916511397. The cubic root of 16220689 is about 253.1374684505.

The spelling of 16220689 in words is "sixteen million, two hundred twenty thousand, six hundred eighty-nine".