16866980 has 48 divisors (see below), whose sum is σ = 39478320. Its totient is φ = 6010368.

The previous prime is 16866977. The next prime is 16867001. The reversal of 16866980 is 8966861.

It can be written as a sum of positive squares in 8 ways, for example, as 155236 + 16711744 = 394^2 + 4088^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6422 + ... + 8658.

It is an arithmetic number, because the mean of its divisors is an integer number (822465).

Almost surely, 2^16866980 is an apocalyptic number.

16866980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16866980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19739160).

16866980 is an abundant number, since it is smaller than the sum of its proper divisors (22611340).

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

16866980 is a wasteful number, since it uses less digits than its factorization.

16866980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288 (or 2286 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 16866980 is about 4106.9429019649. The cubic root of 16866980 is about 256.4557514675.

The spelling of 16866980 in words is "sixteen million, eight hundred sixty-six thousand, nine hundred eighty".