689787252 has 240 divisors, whose sum is σ = 2304056832. Its totient is φ = 174726720.

The previous prime is 689787251. The next prime is 689787281. The reversal of 689787252 is 252787986.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (3386880) is a multiple of the sum of its prime factors (720).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689787251) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1072443 + ... + 1073085.

Almost surely, 2^689787252 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 689787252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1152028416).

689787252 is an abundant number, since it is smaller than the sum of its proper divisors (1614269580).

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

689787252 is a wasteful number, since it uses less digits than its factorization.

689787252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720 (or 709 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 689787252 is about 26263.8011719553. The cubic root of 689787252 is about 883.5647636003.

It can be divided in two parts, 6897 and 87252, that added together give a palindrome (94149).

The spelling of 689787252 in words is "six hundred eighty-nine million, seven hundred eighty-seven thousand, two hundred fifty-two".