689685500 has 96 divisors (see below), whose sum is σ = 1732069248. Its totient is φ = 235008000.

The previous prime is 689685499. The next prime is 689685509. The reversal of 689685500 is 5586986.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689685509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 674990 + ... + 676010.

It is an arithmetic number, because the mean of its divisors is an integer number (18042388).

Almost surely, 2^689685500 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 689685500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (866034624).

689685500 is an abundant number, since it is smaller than the sum of its proper divisors (1042383748).

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

689685500 is a wasteful number, since it uses less digits than its factorization.

689685500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240 (or 1228 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 47.

The square root of 689685500 is about 26261.8639856351. The cubic root of 689685500 is about 883.5213159515.

The spelling of 689685500 in words is "six hundred eighty-nine million, six hundred eighty-five thousand, five hundred".