16446387 has 4 divisors (see below), whose sum is σ = 21928520. Its totient is φ = 10964256.

The previous prime is 16446379. The next prime is 16446413. The reversal of 16446387 is 78364461.

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

It is not a de Polignac number, because 16446387 - 2³ = 16446379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16446347) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2741062 + ... + 2741067.

It is an arithmetic number, because the mean of its divisors is an integer number (5482130).

Almost surely, 2^16446387 is an apocalyptic number.

16446387 is a deficient number, since it is larger than the sum of its proper divisors (5482133).

16446387 is an equidigital number, since it uses as much as digits as its factorization.

16446387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5482132.

The product of its digits is 96768, while the sum is 39.

The square root of 16446387 is about 4055.4145287504. The cubic root of 16446387 is about 254.3061336636.

The spelling of 16446387 in words is "sixteen million, four hundred forty-six thousand, three hundred eighty-seven".