686687222 has 48 divisors (see below), whose sum is σ = 1191532032. Its totient is φ = 295626240.

The previous prime is 686687213. The next prime is 686687233. The reversal of 686687222 is 222786686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 729272 + ... + 730212.

It is an arithmetic number, because the mean of its divisors is an integer number (24823584).

Almost surely, 2^686687222 is an apocalyptic number.

686687222 is a deficient number, since it is larger than the sum of its proper divisors (504844810).

686687222 is a wasteful number, since it uses less digits than its factorization.

686687222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113 (or 1100 counting only the distinct ones).

The product of its digits is 774144, while the sum is 47.

The square root of 686687222 is about 26204.7175523798. The cubic root of 686687222 is about 882.2391418976.

The spelling of 686687222 in words is "six hundred eighty-six million, six hundred eighty-seven thousand, two hundred twenty-two".