16828989 has 4 divisors (see below), whose sum is σ = 22438656. Its totient is φ = 11219324.

The previous prime is 16828967. The next prime is 16828991. The reversal of 16828989 is 98982861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16828989 - 2⁵ = 16828957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16828949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2804829 + ... + 2804834.

It is an arithmetic number, because the mean of its divisors is an integer number (5609664).

Almost surely, 2^16828989 is an apocalyptic number.

It is an amenable number.

16828989 is a deficient number, since it is larger than the sum of its proper divisors (5609667).

16828989 is an equidigital number, since it uses as much as digits as its factorization.

16828989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5609666.

The product of its digits is 497664, while the sum is 51.

The square root of 16828989 is about 4102.3150780992. The cubic root of 16828989 is about 256.2630606867.

The spelling of 16828989 in words is "sixteen million, eight hundred twenty-eight thousand, nine hundred eighty-nine".