16646322 has 64 divisors (see below), whose sum is σ = 41969664. Its totient is φ = 4275840.

The previous prime is 16646317. The next prime is 16646323. The reversal of 16646322 is 22364661.

It is a super-2 number, since 2×16646322² = 554200072255368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16646322.

It is not an unprimeable number, because it can be changed into a prime (16646323) 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 31 ways as a sum of consecutive naturals, for example, 63163 + ... + 63425.

It is an arithmetic number, because the mean of its divisors is an integer number (655776).

Almost surely, 2^16646322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16646322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20984832).

16646322 is an abundant number, since it is smaller than the sum of its proper divisors (25323342).

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

16646322 is a wasteful number, since it uses less digits than its factorization.

16646322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423.

The product of its digits is 10368, while the sum is 30.

The square root of 16646322 is about 4079.9904411653. The cubic root of 16646322 is about 255.3324997454.

The spelling of 16646322 in words is "sixteen million, six hundred forty-six thousand, three hundred twenty-two".