1686900044 has 6 divisors (see below), whose sum is σ = 2952075084. Its totient is φ = 843450020.

The previous prime is 1686900013. The next prime is 1686900067. The reversal of 1686900044 is 4400096861.

It is a junction number, because it is equal to n+sod(n) for n = 1686899980 and 1686900007.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210862502 + ... + 210862509.

It is an arithmetic number, because the mean of its divisors is an integer number (492012514).

Almost surely, 2^1686900044 is an apocalyptic number.

It is an amenable number.

1686900044 is a deficient number, since it is larger than the sum of its proper divisors (1265175040).

1686900044 is a wasteful number, since it uses less digits than its factorization.

1686900044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421725015 (or 421725013 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 1686900044 is about 41071.8887318321. Note that the first 3 decimals coincide. The cubic root of 1686900044 is about 1190.4096802838.

The spelling of 1686900044 in words is "one billion, six hundred eighty-six million, nine hundred thousand, forty-four".