689983616 has 64 divisors (see below), whose sum is σ = 1621685760. Its totient is φ = 286156800.

The previous prime is 689983589. The next prime is 689983669. The reversal of 689983616 is 616389986.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15356 + ... + 40196.

It is an arithmetic number, because the mean of its divisors is an integer number (25338840).

Almost surely, 2^689983616 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 689983616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (810842880).

689983616 is an abundant number, since it is smaller than the sum of its proper divisors (931702144).

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

689983616 is a wasteful number, since it uses less digits than its factorization.

689983616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24893 (or 24881 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 56.

The square root of 689983616 is about 26267.5392071659. The cubic root of 689983616 is about 883.6485980723.

The spelling of 689983616 in words is "six hundred eighty-nine million, nine hundred eighty-three thousand, six hundred sixteen".