16861316 has 12 divisors (see below), whose sum is σ = 29812188. Its totient is φ = 8343552.

The previous prime is 16861309. The next prime is 16861343. The reversal of 16861316 is 61316861.

It can be written as a sum of positive squares in 2 ways, for example, as 8761600 + 8099716 = 2960^2 + 2846^2 .

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, 21341 + ... + 22116.

It is an arithmetic number, because the mean of its divisors is an integer number (2484349).

Almost surely, 2^16861316 is an apocalyptic number.

It is an amenable number.

16861316 is a deficient number, since it is larger than the sum of its proper divisors (12950872).

16861316 is a wasteful number, since it uses less digits than its factorization.

16861316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43558 (or 43556 counting only the distinct ones).

The product of its digits is 5184, while the sum is 32.

The square root of 16861316 is about 4106.2532800596. The cubic root of 16861316 is about 256.4270419613.

The spelling of 16861316 in words is "sixteen million, eight hundred sixty-one thousand, three hundred sixteen".