689131520 has 416 divisors, whose sum is σ = 2264647680. Its totient is φ = 194641920.

The previous prime is 689131511. The next prime is 689131523. The reversal of 689131520 is 25131986.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689131523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29962229 + ... + 29962251.

Almost surely, 2^689131520 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 689131520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1132323840).

689131520 is an abundant number, since it is smaller than the sum of its proper divisors (1575516160).

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

689131520 is a wasteful number, since it uses less digits than its factorization.

689131520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 689131520 is about 26251.3146337474. The cubic root of 689131520 is about 883.2846939715.

The spelling of 689131520 in words is "six hundred eighty-nine million, one hundred thirty-one thousand, five hundred twenty".