689612220 has 288 divisors, whose sum is σ = 2509678080. Its totient is φ = 151303680.

The previous prime is 689612213. The next prime is 689612227. The reversal of 689612220 is 22216986.

It is a happy number.

689612220 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 (689612213) and next prime (689612227).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689612227) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 864862 + ... + 865658.

It is an arithmetic number, because the mean of its divisors is an integer number (8714160).

Almost surely, 2^689612220 is an apocalyptic number.

689612220 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 689612220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1254839040).

689612220 is an abundant number, since it is smaller than the sum of its proper divisors (1820065860).

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

689612220 is a wasteful number, since it uses less digits than its factorization.

689612220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865 (or 860 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 689612220 is about 26260.4687696164. The cubic root of 689612220 is about 883.4900230722.

The spelling of 689612220 in words is "six hundred eighty-nine million, six hundred twelve thousand, two hundred twenty".