683688816 has 80 divisors (see below), whose sum is σ = 1967269920. Its totient is φ = 227335680.

The previous prime is 683688809. The next prime is 683688821. The reversal of 683688816 is 618886386.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197436 + ... + 200868.

It is an arithmetic number, because the mean of its divisors is an integer number (24590874).

Almost surely, 2^683688816 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 683688816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (983634960).

683688816 is an abundant number, since it is smaller than the sum of its proper divisors (1283581104).

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

683688816 is a wasteful number, since it uses less digits than its factorization.

683688816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911 (or 3899 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The square root of 683688816 is about 26147.4437756351. The cubic root of 683688816 is about 880.9531751811.

The spelling of 683688816 in words is "six hundred eighty-three million, six hundred eighty-eight thousand, eight hundred sixteen".