16871816 has 16 divisors (see below), whose sum is σ = 34068300. Its totient is φ = 7786944.

The previous prime is 16871809. The next prime is 16871821. The reversal of 16871816 is 61817861.

It can be written as a sum of positive squares in 2 ways, for example, as 16564900 + 306916 = 4070^2 + 554^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16871816.

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, 81011 + ... + 81218.

Almost surely, 2^16871816 is an apocalyptic number.

It is an amenable number.

16871816 is an abundant number, since it is smaller than the sum of its proper divisors (17196484).

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

16871816 is a wasteful number, since it uses less digits than its factorization.

16871816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162248 (or 162244 counting only the distinct ones).

The product of its digits is 16128, while the sum is 38.

The square root of 16871816 is about 4107.5316188680. The cubic root of 16871816 is about 256.4802589470.

The spelling of 16871816 in words is "sixteen million, eight hundred seventy-one thousand, eight hundred sixteen".