16897986 has 48 divisors (see below), whose sum is σ = 42876288. Its totient is φ = 4708800.

The previous prime is 16897963. The next prime is 16897987. The reversal of 16897986 is 68979861.

It is not an unprimeable number, because it can be changed into a prime (16897987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3531 + ... + 6801.

It is an arithmetic number, because the mean of its divisors is an integer number (893256).

Almost surely, 2^16897986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16897986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21438144).

16897986 is an abundant number, since it is smaller than the sum of its proper divisors (25978302).

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

16897986 is a wasteful number, since it uses less digits than its factorization.

16897986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3327 (or 3324 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 16897986 is about 4110.7159960279. The cubic root of 16897986 is about 256.6127999249.

The spelling of 16897986 in words is "sixteen million, eight hundred ninety-seven thousand, nine hundred eighty-six".