16649984 has 36 divisors (see below), whose sum is σ = 35798616. Its totient is φ = 7683072.

The previous prime is 16649959. The next prime is 16649989. The reversal of 16649984 is 48994661.

It is a happy number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16649989) 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 3 ways as a sum of consecutive naturals, for example, 827 + ... + 5829.

It is an arithmetic number, because the mean of its divisors is an integer number (994406).

Almost surely, 2^16649984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16649984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17899308).

16649984 is an abundant number, since it is smaller than the sum of its proper divisors (19148632).

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

16649984 is an equidigital number, since it uses as much as digits as its factorization.

16649984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5032 (or 5018 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 16649984 is about 4080.4391920478. The cubic root of 16649984 is about 255.3512217802.

The spelling of 16649984 in words is "sixteen million, six hundred forty-nine thousand, nine hundred eighty-four".