16389443 has 4 divisors (see below), whose sum is σ = 18730800. Its totient is φ = 14048088.

The previous prime is 16389431. The next prime is 16389467. The reversal of 16389443 is 34498361.

16389443 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

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 16389443 - 2¹⁰ = 16388419 is a prime.

It is a super-2 number, since 2×16389443² = 537227683700498, which contains 22 as substring.

It is a Duffinian number.

16389443 is strictly pandigital in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 16389397 and 16389406.

It is not an unprimeable number, because it can be changed into a prime (16389403) 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, 1170668 + ... + 1170681.

It is an arithmetic number, because the mean of its divisors is an integer number (4682700).

Almost surely, 2^16389443 is an apocalyptic number.

16389443 is a deficient number, since it is larger than the sum of its proper divisors (2341357).

16389443 is an equidigital number, since it uses as much as digits as its factorization.

16389443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341356.

The product of its digits is 62208, while the sum is 38.

The square root of 16389443 is about 4048.3877037655. The cubic root of 16389443 is about 254.0122909298.

The spelling of 16389443 in words is "sixteen million, three hundred eighty-nine thousand, four hundred forty-three".