16887172 has 12 divisors (see below), whose sum is σ = 29814876. Its totient is φ = 8368640.

The previous prime is 16887161. The next prime is 16887191. The reversal of 16887172 is 27178861.

It can be written as a sum of positive squares in 2 ways, for example, as 4734976 + 12152196 = 2176^2 + 3486^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18229 + ... + 19132.

It is an arithmetic number, because the mean of its divisors is an integer number (2484573).

Almost surely, 2^16887172 is an apocalyptic number.

It is an amenable number.

16887172 is a deficient number, since it is larger than the sum of its proper divisors (12927704).

16887172 is a wasteful number, since it uses less digits than its factorization.

16887172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37478 (or 37476 counting only the distinct ones).

The product of its digits is 37632, while the sum is 40.

The square root of 16887172 is about 4109.4004428870. The cubic root of 16887172 is about 256.5580477789.

The spelling of 16887172 in words is "sixteen million, eight hundred eighty-seven thousand, one hundred seventy-two".