689133744 has 100 divisors (see below), whose sum is σ = 2148032656. Its totient is φ = 212035968.

The previous prime is 689133737. The next prime is 689133749. The reversal of 689133744 is 447331986.

It is a self number, because there is not a number n which added to its sum of digits gives 689133744.

It is not an unprimeable number, because it can be changed into a prime (689133749) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3604 + ... + 37299.

Almost surely, 2^689133744 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 689133744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1074016328).

689133744 is an abundant number, since it is smaller than the sum of its proper divisors (1458898912).

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

689133744 is a wasteful number, since it uses less digits than its factorization.

689133744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40936 (or 40921 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 689133744 is about 26251.3569934965. The cubic root of 689133744 is about 883.2856441641.

The spelling of 689133744 in words is "six hundred eighty-nine million, one hundred thirty-three thousand, seven hundred forty-four".