686738214 has 12 divisors (see below), whose sum is σ = 1487932836. Its totient is φ = 228912732.

The previous prime is 686738203. The next prime is 686738243. The reversal of 686738214 is 412837686.

It is a self number, because there is not a number n which added to its sum of digits gives 686738214.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19076044 + ... + 19076079.

It is an arithmetic number, because the mean of its divisors is an integer number (123994403).

Almost surely, 2^686738214 is an apocalyptic number.

686738214 is an abundant number, since it is smaller than the sum of its proper divisors (801194622).

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

686738214 is a wasteful number, since it uses less digits than its factorization.

686738214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38152131 (or 38152128 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 686738214 is about 26205.6904888995. The cubic root of 686738214 is about 882.2609791200.

The spelling of 686738214 in words is "six hundred eighty-six million, seven hundred thirty-eight thousand, two hundred fourteen".