170988 has 12 divisors (see below), whose sum is σ = 399000. Its totient is φ = 56992.

The previous prime is 170971. The next prime is 171007. The reversal of 170988 is 889071.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×170988² = 58473792288, which contains 22 as substring.

It is an unprimeable number.

170988 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 7113 + ... + 7136.

It is an arithmetic number, because the mean of its divisors is an integer number (33250).

2¹⁷⁰⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

170988 is an abundant number, since it is smaller than the sum of its proper divisors (228012).

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

170988 is a wasteful number, since it uses less digits than its factorization.

170988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14256 (or 14254 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 170988 is about 413.5069527831. The cubic root of 170988 is about 55.5036926364.

The spelling of 170988 in words is "one hundred seventy thousand, nine hundred eighty-eight".