689218504 has 72 divisors (see below), whose sum is σ = 1433038230. Its totient is φ = 310602240.

The previous prime is 689218501. The next prime is 689218531. The reversal of 689218504 is 405812986.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 193265604 + 495952900 = 13902^2 + 22270^2 .

It is not an unprimeable number, because it can be changed into a prime (689218501) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5030724 + ... + 5030860.

Almost surely, 2^689218504 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 689218504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (716519115).

689218504 is an abundant number, since it is smaller than the sum of its proper divisors (743819726).

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

689218504 is a wasteful number, since it uses less digits than its factorization.

689218504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 689218504 is about 26252.9713365935. The cubic root of 689218504 is about 883.3218559167.

The spelling of 689218504 in words is "six hundred eighty-nine million, two hundred eighteen thousand, five hundred four".