689986220 has 192 divisors, whose sum is σ = 1896652800. Its totient is φ = 204595200.

The previous prime is 689986211. The next prime is 689986229. The reversal of 689986220 is 22689986.

It is an interprime number because it is at equal distance from previous prime (689986211) and next prime (689986229).

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (689986229) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4630706 + ... + 4630854.

It is an arithmetic number, because the mean of its divisors is an integer number (9878400).

Almost surely, 2^689986220 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 689986220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948326400).

689986220 is an abundant number, since it is smaller than the sum of its proper divisors (1206666580).

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

689986220 is a wasteful number, since it uses less digits than its factorization.

689986220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 689986220 is about 26267.5887740006. The cubic root of 689986220 is about 883.6497097017.

The spelling of 689986220 in words is "six hundred eighty-nine million, nine hundred eighty-six thousand, two hundred twenty".