689734912 has 54 divisors (see below), whose sum is σ = 1396202234. Its totient is φ = 340055040.

The previous prime is 689734907. The next prime is 689734919. The reversal of 689734912 is 219437986.

It can be written as a sum of positive squares in only one way, i.e., 531579136 + 158155776 = 23056^2 + 12576^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689734919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4393138 + ... + 4393294.

Almost surely, 2^689734912 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 689734912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (698101117).

689734912 is an abundant number, since it is smaller than the sum of its proper divisors (706467322).

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

689734912 is an equidigital number, since it uses as much as digits as its factorization.

689734912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435 (or 290 counting only the distinct ones).

The product of its digits is 653184, while the sum is 49.

The square root of 689734912 is about 26262.8047245529. The cubic root of 689734912 is about 883.5424151882.

The spelling of 689734912 in words is "six hundred eighty-nine million, seven hundred thirty-four thousand, nine hundred twelve".