683613840 has 320 divisors, whose sum is σ = 2640830976. Its totient is φ = 142442496.

The previous prime is 683613817. The next prime is 683613907. The reversal of 683613840 is 48316386.

683613840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2467782 + ... + 2468058.

Almost surely, 2^683613840 is an apocalyptic number.

683613840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 683613840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1320415488).

683613840 is an abundant number, since it is smaller than the sum of its proper divisors (1957217136).

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

683613840 is a wasteful number, since it uses less digits than its factorization.

683613840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 683613840 is about 26146.0100206513. The cubic root of 683613840 is about 880.9209710758.

The spelling of 683613840 in words is "six hundred eighty-three million, six hundred thirteen thousand, eight hundred forty".