16643396 has 24 divisors (see below), whose sum is σ = 36313536. Its totient is φ = 6484320.

The previous prime is 16643383. The next prime is 16643399. The reversal of 16643396 is 69334661.

It is not an unprimeable number, because it can be changed into a prime (16643399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26711 + ... + 27326.

It is an arithmetic number, because the mean of its divisors is an integer number (1513064).

Almost surely, 2^16643396 is an apocalyptic number.

It is an amenable number.

16643396 is an abundant number, since it is smaller than the sum of its proper divisors (19670140).

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

16643396 is a wasteful number, since it uses less digits than its factorization.

16643396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54059 (or 54057 counting only the distinct ones).

The product of its digits is 69984, while the sum is 38.

The square root of 16643396 is about 4079.6318461351. The cubic root of 16643396 is about 255.3175385491.

The spelling of 16643396 in words is "sixteen million, six hundred forty-three thousand, three hundred ninety-six".