16671728 has 10 divisors (see below), whose sum is σ = 32301504. Its totient is φ = 8335856.

The previous prime is 16671701. The next prime is 16671731. The reversal of 16671728 is 82717661.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 16671691 and 16671700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520976 + ... + 521007.

Almost surely, 2^16671728 is an apocalyptic number.

It is an amenable number.

16671728 is a deficient number, since it is larger than the sum of its proper divisors (15629776).

16671728 is a wasteful number, since it uses less digits than its factorization.

16671728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041991 (or 1041985 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 16671728 is about 4083.1027417884. The cubic root of 16671728 is about 255.4623318307.

The spelling of 16671728 in words is "sixteen million, six hundred seventy-one thousand, seven hundred twenty-eight".