686844914 has 48 divisors (see below), whose sum is σ = 1274781888. Its totient is φ = 271734528.

The previous prime is 686844869. The next prime is 686844919. The reversal of 686844914 is 419448686.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (686844919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 212837 + ... + 216039.

It is an arithmetic number, because the mean of its divisors is an integer number (26557956).

Almost surely, 2^686844914 is an apocalyptic number.

686844914 is a deficient number, since it is larger than the sum of its proper divisors (587936974).

686844914 is a wasteful number, since it uses less digits than its factorization.

686844914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299 (or 3282 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 50.

The square root of 686844914 is about 26207.7262272025. The cubic root of 686844914 is about 882.3066696852.

The spelling of 686844914 in words is "six hundred eighty-six million, eight hundred forty-four thousand, nine hundred fourteen".