16988 has 12 divisors (see below), whose sum is σ = 30912. Its totient is φ = 8160.

The previous prime is 16987. The next prime is 16993. The reversal of 16988 is 88961.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 16988.

It is not an unprimeable number, because it can be changed into a prime (16981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56 + ... + 192.

It is an arithmetic number, because the mean of its divisors is an integer number (2576).

2¹⁶⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

16988 is a deficient number, since it is larger than the sum of its proper divisors (13924).

16988 is a wasteful number, since it uses less digits than its factorization.

16988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 170 counting only the distinct ones).

The product of its digits is 3456, while the sum is 32.

The square root of 16988 is about 130.3380220810. The cubic root of 16988 is about 25.7067644081.

Adding to 16988 its sum of digits (32), we get a triangular number (17020 = T₁₈₄).

The spelling of 16988 in words is "sixteen thousand, nine hundred eighty-eight".