689250 has 32 divisors (see below), whose sum is σ = 1722240. Its totient is φ = 183600.

The previous prime is 689237. The next prime is 689257. The reversal of 689250 is 52986.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (689257) by changing a digit.

689250 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 (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291 + ... + 1209.

It is an arithmetic number, because the mean of its divisors is an integer number (53820).

2⁶⁸⁹²⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (861120).

689250 is an abundant number, since it is smaller than the sum of its proper divisors (1032990).

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

689250 is a wasteful number, since it uses less digits than its factorization.

689250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939 (or 929 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 689250 is about 830.2108166002. The cubic root of 689250 is about 88.3335311099. Note that the first 3 decimals are identical.

It can be divided in two parts, 689 and 250, that added together give a palindrome (939).

The spelling of 689250 in words is "six hundred eighty-nine thousand, two hundred fifty".