683943840 has 144 divisors (see below), whose sum is σ = 2346061536. Its totient is φ = 181440000.

The previous prime is 683943833. The next prime is 683943863. The reversal of 683943840 is 48349386.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 302715 + ... + 304965.

It is an arithmetic number, because the mean of its divisors is an integer number (16292094).

Almost surely, 2^683943840 is an apocalyptic number.

683943840 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 683943840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1173030768).

683943840 is an abundant number, since it is smaller than the sum of its proper divisors (1662117696).

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

683943840 is a wasteful number, since it uses less digits than its factorization.

683943840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483 (or 2472 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 683943840 is about 26152.3199735702. The cubic root of 683943840 is about 881.0626968762.

The spelling of 683943840 in words is "six hundred eighty-three million, nine hundred forty-three thousand, eight hundred forty".