16643796 has 72 divisors (see below), whose sum is σ = 43656480. Its totient is φ = 4927104.

The previous prime is 16643779. The next prime is 16643839. The reversal of 16643796 is 69734661.

16643796 = T₈₈ + T₈₉ + ... + T₄₆₄.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58671 + ... + 58953.

It is an arithmetic number, because the mean of its divisors is an integer number (606340).

Almost surely, 2^16643796 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 16643796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21828240).

16643796 is an abundant number, since it is smaller than the sum of its proper divisors (27012684).

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

16643796 is a wasteful number, since it uses less digits than its factorization.

16643796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 330 counting only the distinct ones).

The product of its digits is 163296, while the sum is 42.

The square root of 16643796 is about 4079.6808698721. The cubic root of 16643796 is about 255.3195839289.

It can be divided in two parts, 1664 and 3796, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 16643796 in words is "sixteen million, six hundred forty-three thousand, seven hundred ninety-six".