206684644 has 12 divisors (see below), whose sum is σ = 362086704. Its totient is φ = 103231304.

The previous prime is 206684633. The next prime is 206684669. The reversal of 206684644 is 446486602.

It is a junction number, because it is equal to n+sod(n) for n = 206684597 and 206684606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23494 + ... + 31069.

It is an arithmetic number, because the mean of its divisors is an integer number (30173892).

Almost surely, 2^206684644 is an apocalyptic number.

It is an amenable number.

206684644 is a deficient number, since it is larger than the sum of its proper divisors (155402060).

206684644 is a wasteful number, since it uses less digits than its factorization.

206684644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55514 (or 55512 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 40.

The square root of 206684644 is about 14376.5310141216. The cubic root of 206684644 is about 591.2476175098.

The spelling of 206684644 in words is "two hundred six million, six hundred eighty-four thousand, six hundred forty-four".