683440 has 20 divisors (see below), whose sum is σ = 1589184. Its totient is φ = 273344.

The previous prime is 683437. The next prime is 683447. The reversal of 683440 is 44386.

683440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (683447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4192 + ... + 4351.

2⁶⁸³⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

683440 is an abundant number, since it is smaller than the sum of its proper divisors (905744).

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

683440 is a wasteful number, since it uses less digits than its factorization.

683440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8556 (or 8550 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 683440 is about 826.7043002186. The cubic root of 683440 is about 88.0846293299.

The spelling of 683440 in words is "six hundred eighty-three thousand, four hundred forty".