16328489 has 4 divisors (see below), whose sum is σ = 16343124. Its totient is φ = 16313856.

The previous prime is 16328461. The next prime is 16328491. The reversal of 16328489 is 98482361.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5798464 + 10530025 = 2408^2 + 3245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16328489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16321489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5492 + ... + 7925.

It is an arithmetic number, because the mean of its divisors is an integer number (4085781).

Almost surely, 2^16328489 is an apocalyptic number.

It is an amenable number.

16328489 is a deficient number, since it is larger than the sum of its proper divisors (14635).

16328489 is a wasteful number, since it uses less digits than its factorization.

16328489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14634.

The product of its digits is 82944, while the sum is 41.

The square root of 16328489 is about 4040.8525090629. The cubic root of 16328489 is about 253.6970005871.

The spelling of 16328489 in words is "sixteen million, three hundred twenty-eight thousand, four hundred eighty-nine".