16728459 has 16 divisors (see below), whose sum is σ = 25764480. Its totient is φ = 9541760.

The previous prime is 16728449. The next prime is 16728463. The reversal of 16728459 is 95482761.

It is not a de Polignac number, because 16728459 - 2⁵ = 16728427 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 16728459.

It is not an unprimeable number, because it can be changed into a prime (16728449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14349 + ... + 15470.

It is an arithmetic number, because the mean of its divisors is an integer number (1610280).

Almost surely, 2^16728459 is an apocalyptic number.

16728459 is a deficient number, since it is larger than the sum of its proper divisors (9036021).

16728459 is a wasteful number, since it uses less digits than its factorization.

16728459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29850.

The product of its digits is 120960, while the sum is 42.

The square root of 16728459 is about 4090.0438872951. The cubic root of 16728459 is about 255.7517684529.

The spelling of 16728459 in words is "sixteen million, seven hundred twenty-eight thousand, four hundred fifty-nine".