169720 has 16 divisors (see below), whose sum is σ = 381960. Its totient is φ = 67872.

The previous prime is 169709. The next prime is 169733. The reversal of 169720 is 27961.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

169720 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2082 + ... + 2161.

2¹⁶⁹⁷²⁰ is an apocalyptic number.

169720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

169720 is an abundant number, since it is smaller than the sum of its proper divisors (212240).

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

169720 is a wasteful number, since it uses less digits than its factorization.

169720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4254 (or 4250 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 169720 is about 411.9708727568. The cubic root of 169720 is about 55.3661520444.

The spelling of 169720 in words is "one hundred sixty-nine thousand, seven hundred twenty".