689620 has 36 divisors (see below), whose sum is σ = 1536444. Its totient is φ = 259840.

The previous prime is 689603. The next prime is 689621. The reversal of 689620 is 26986.

It can be written as a sum of positive squares in 6 ways, for example, as 71824 + 617796 = 268^2 + 786^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16800 + ... + 16840.

It is an arithmetic number, because the mean of its divisors is an integer number (42679).

2⁶⁸⁹⁶²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (768222).

689620 is an abundant number, since it is smaller than the sum of its proper divisors (846824).

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

689620 is a wasteful number, since it uses less digits than its factorization.

689620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 689620 is about 830.4336216700. The cubic root of 689620 is about 88.3493345484.

The spelling of 689620 in words is "six hundred eighty-nine thousand, six hundred twenty".