683865644 has 48 divisors (see below), whose sum is σ = 1494205440. Its totient is φ = 266060160.

The previous prime is 683865643. The next prime is 683865649. The reversal of 683865644 is 446568386.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 683865592 and 683865601.

It is not an unprimeable number, because it can be changed into a prime (683865641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318944 + ... + 321080.

It is an arithmetic number, because the mean of its divisors is an integer number (31129280).

Almost surely, 2^683865644 is an apocalyptic number.

It is an amenable number.

683865644 is an abundant number, since it is smaller than the sum of its proper divisors (810339796).

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

683865644 is a wasteful number, since it uses less digits than its factorization.

683865644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3198 (or 3196 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 50.

The square root of 683865644 is about 26150.8249200671. The cubic root of 683865644 is about 881.0291179962.

The spelling of 683865644 in words is "six hundred eighty-three million, eight hundred sixty-five thousand, six hundred forty-four".