16489220 has 48 divisors (see below), whose sum is σ = 38054016. Its totient is φ = 5952000.

The previous prime is 16489219. The next prime is 16489223. The reversal of 16489220 is 2298461.

It is not an unprimeable number, because it can be changed into a prime (16489223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52865 + ... + 53175.

It is an arithmetic number, because the mean of its divisors is an integer number (792792).

Almost surely, 2^16489220 is an apocalyptic number.

16489220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16489220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19027008).

16489220 is an abundant number, since it is smaller than the sum of its proper divisors (21564796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16489220 is a wasteful number, since it uses less digits than its factorization.

16489220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 16489220 is about 4060.6920592431. The cubic root of 16489220 is about 254.5267140656.

The spelling of 16489220 in words is "sixteen million, four hundred eighty-nine thousand, two hundred twenty".