16722856 has 8 divisors (see below), whose sum is σ = 31355370. Its totient is φ = 8361424.

The previous prime is 16722847. The next prime is 16722859. The reversal of 16722856 is 65822761.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16402500 + 320356 = 4050^2 + 566^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (16722859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045171 + ... + 1045186.

Almost surely, 2^16722856 is an apocalyptic number.

It is an amenable number.

16722856 is a deficient number, since it is larger than the sum of its proper divisors (14632514).

16722856 is a wasteful number, since it uses less digits than its factorization.

16722856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090363 (or 2090359 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 16722856 is about 4089.3588739557. The cubic root of 16722856 is about 255.7232115851.

It can be divided in two parts, 16722 and 856, that added together give a triangular number (17578 = T₁₈₇).

The spelling of 16722856 in words is "sixteen million, seven hundred twenty-two thousand, eight hundred fifty-six".