16446443 has 4 divisors (see below), whose sum is σ = 17711568. Its totient is φ = 15181320.

The previous prime is 16446433. The next prime is 16446503. The reversal of 16446443 is 34464461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16446443 - 2⁶ = 16446379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16446413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 632543 + ... + 632568.

It is an arithmetic number, because the mean of its divisors is an integer number (4427892).

Almost surely, 2^16446443 is an apocalyptic number.

16446443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16446443 is a deficient number, since it is larger than the sum of its proper divisors (1265125).

16446443 is a wasteful number, since it uses less digits than its factorization.

16446443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265124.

The product of its digits is 27648, while the sum is 32.

The square root of 16446443 is about 4055.4214330942. The cubic root of 16446443 is about 254.3064223010.

The spelling of 16446443 in words is "sixteen million, four hundred forty-six thousand, four hundred forty-three".