689220 has 72 divisors (see below), whose sum is σ = 2393664. Its totient is φ = 157248.

The previous prime is 689219. The next prime is 689233. The reversal of 689220 is 22986.

It is a nialpdrome in base 15 and base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 689220.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 987 + ... + 1533.

2⁶⁸⁹²²⁰ is an apocalyptic number.

689220 is a gapful number since it is divisible by the number (60) 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 689220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1196832).

689220 is an abundant number, since it is smaller than the sum of its proper divisors (1704444).

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

689220 is a wasteful number, since it uses less digits than its factorization.

689220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 689220 is about 830.1927487036. The cubic root of 689220 is about 88.3322495021.

It can be divided in two parts, 689 and 220, that added together give a palindrome (909).

The spelling of 689220 in words is "six hundred eighty-nine thousand, two hundred twenty".