16728705 has 48 divisors (see below), whose sum is σ = 34594560. Its totient is φ = 7311744.

The previous prime is 16728703. The next prime is 16728709. The reversal of 16728705 is 50782761.

16728705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16728705 - 2¹ = 16728703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16728705.

It is not an unprimeable number, because it can be changed into a prime (16728703) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6091 + ... + 8399.

It is an arithmetic number, because the mean of its divisors is an integer number (720720).

Almost surely, 2^16728705 is an apocalyptic number.

16728705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16728705 is an abundant number, since it is smaller than the sum of its proper divisors (17865855).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16728705 is a wasteful number, since it uses less digits than its factorization.

16728705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350 (or 2347 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 16728705 is about 4090.0739602115. The cubic root of 16728705 is about 255.7530220975.

The spelling of 16728705 in words is "sixteen million, seven hundred twenty-eight thousand, seven hundred five".