689707986 has 192 divisors, whose sum is σ = 1737469440. Its totient is φ = 181350400.

The previous prime is 689707981. The next prime is 689708011.

689707986 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (689707981) 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, 14674615 + ... + 14674661.

It is an arithmetic number, because the mean of its divisors is an integer number (9049320).

Almost surely, 2^689707986 is an apocalyptic number.

689707986 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 689707986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (868734720).

689707986 is an abundant number, since it is smaller than the sum of its proper divisors (1047761454).

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

689707986 is a wasteful number, since it uses less digits than its factorization.

689707986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 60.

The square root of 689707986 is about 26262.2920934179. The cubic root of 689707986 is about 883.5309177407.

The spelling of 689707986 in words is "six hundred eighty-nine million, seven hundred seven thousand, nine hundred eighty-six".