689313240 has 448 divisors, whose sum is σ = 2908604160. Its totient is φ = 142767360.

The previous prime is 689313239. The next prime is 689313271. The reversal of 689313240 is 42313986.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 689313195 and 689313204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 2245167 + ... + 2245473.

It is an arithmetic number, because the mean of its divisors is an integer number (6492420).

Almost surely, 2^689313240 is an apocalyptic number.

689313240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689313240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1454302080).

689313240 is an abundant number, since it is smaller than the sum of its proper divisors (2219290920).

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

689313240 is a wasteful number, since it uses less digits than its factorization.

689313240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 689313240 is about 26254.7755655995. The cubic root of 689313240 is about 883.3623261715.

The spelling of 689313240 in words is "six hundred eighty-nine million, three hundred thirteen thousand, two hundred forty".