689868500 has 96 divisors (see below), whose sum is σ = 1606524192. Its totient is φ = 257894400.

The previous prime is 689868461. The next prime is 689868539. The reversal of 689868500 is 5868986.

689868500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (689868461) and next prime (689868539).

It can be written as a sum of positive squares in 16 ways, for example, as 322992784 + 366875716 = 17972^2 + 19154^2 .

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2354354 + ... + 2354646.

It is an arithmetic number, because the mean of its divisors is an integer number (16734627).

Almost surely, 2^689868500 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 689868500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (803262096).

689868500 is an abundant number, since it is smaller than the sum of its proper divisors (916655692).

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

689868500 is a wasteful number, since it uses less digits than its factorization.

689868500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 50.

The square root of 689868500 is about 26265.3478941361. The cubic root of 689868500 is about 883.5994530650.

The spelling of 689868500 in words is "six hundred eighty-nine million, eight hundred sixty-eight thousand, five hundred".