16442664 has 64 divisors (see below), whose sum is σ = 47510400. Its totient is φ = 4644864.

The previous prime is 16442663. The next prime is 16442683. The reversal of 16442664 is 46624461.

It is a super-3 number, since 3×16442664³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (16442663) 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, 15792 + ... + 16800.

It is an arithmetic number, because the mean of its divisors is an integer number (742350).

Almost surely, 2^16442664 is an apocalyptic number.

16442664 is a gapful number since it is divisible by the number (14) 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 16442664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23755200).

16442664 is an abundant number, since it is smaller than the sum of its proper divisors (31067736).

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

16442664 is a wasteful number, since it uses less digits than its factorization.

16442664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122 (or 1118 counting only the distinct ones).

The product of its digits is 27648, while the sum is 33.

The square root of 16442664 is about 4054.9554868087. The cubic root of 16442664 is about 254.2869429606.

The spelling of 16442664 in words is "sixteen million, four hundred forty-two thousand, six hundred sixty-four".