683245640 has 128 divisors (see below), whose sum is σ = 2029536000. Its totient is φ = 200417280.

The previous prime is 683245621. The next prime is 683245687. The reversal of 683245640 is 46542386.

It is a junction number, because it is equal to n+sod(n) for n = 683245594 and 683245603.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45836 + ... + 58884.

It is an arithmetic number, because the mean of its divisors is an integer number (15855750).

Almost surely, 2^683245640 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 683245640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1014768000).

683245640 is an abundant number, since it is smaller than the sum of its proper divisors (1346290360).

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

683245640 is a wasteful number, since it uses less digits than its factorization.

683245640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13095 (or 13091 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 683245640 is about 26138.9678449628. The cubic root of 683245640 is about 880.7627855947.

The spelling of 683245640 in words is "six hundred eighty-three million, two hundred forty-five thousand, six hundred forty".