689670 has 48 divisors (see below), whose sum is σ = 1834560. Its totient is φ = 179712.

The previous prime is 689641. The next prime is 689693. The reversal of 689670 is 76986.

It is a d-powerful number, because it can be written as 6² + 8⁵ + 6⁵ + 9⁶ + 7⁶ + 0 .

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7062 + ... + 7158.

It is an arithmetic number, because the mean of its divisors is an integer number (38220).

2⁶⁸⁹⁶⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (917280).

689670 is an abundant number, since it is smaller than the sum of its proper divisors (1144890).

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

689670 is a wasteful number, since it uses less digits than its factorization.

689670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 689670 is about 830.4637258785. The cubic root of 689670 is about 88.3514697146.

It can be divided in two parts, 6 and 89670, that added together give a triangular number (89676 = T₄₂₃).

The spelling of 689670 in words is "six hundred eighty-nine thousand, six hundred seventy".