16772816 has 20 divisors (see below), whose sum is σ = 32788452. Its totient is φ = 8311296.

The previous prime is 16772809. The next prime is 16772831. The reversal of 16772816 is 61827761.

It can be written as a sum of positive squares in 2 ways, for example, as 5856400 + 10916416 = 2420^2 + 3304^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 16772816.

It is a congruent number.

It is an unprimeable number.

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, 2831 + ... + 6446.

Almost surely, 2^16772816 is an apocalyptic number.

16772816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16772816 is a deficient number, since it is larger than the sum of its proper divisors (16015636).

16772816 is a wasteful number, since it uses less digits than its factorization.

16772816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9398 (or 9392 counting only the distinct ones).

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

The square root of 16772816 is about 4095.4628554047. The cubic root of 16772816 is about 255.9776184860.

The spelling of 16772816 in words is "sixteen million, seven hundred seventy-two thousand, eight hundred sixteen".