683643996 has 96 divisors (see below), whose sum is σ = 2113735680. Its totient is φ = 186829632.

The previous prime is 683643991. The next prime is 683644037. The reversal of 683643996 is 699346386.

It is a happy number.

It is a super-2 number, since 2×683643996² = 934738226533696032, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (683643991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2271 + ... + 37046.

It is an arithmetic number, because the mean of its divisors is an integer number (22018080).

Almost surely, 2^683643996 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 683643996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1056867840).

683643996 is an abundant number, since it is smaller than the sum of its proper divisors (1430091684).

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

683643996 is a wasteful number, since it uses less digits than its factorization.

683643996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39360 (or 39352 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 54.

The square root of 683643996 is about 26146.5866988408. The cubic root of 683643996 is about 880.9339241304.

The spelling of 683643996 in words is "six hundred eighty-three million, six hundred forty-three thousand, nine hundred ninety-six".