686050308 has 18 divisors (see below), whose sum is σ = 1734182814. Its totient is φ = 228683424.

The previous prime is 686050301. The next prime is 686050327. The reversal of 686050308 is 803050686.

It can be written as a sum of positive squares in only one way, i.e., 390141504 + 295908804 = 19752^2 + 17202^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 19056953 = 686050308 / (6 + 8 + 6 + 0 + 5 + 0 + 3 + 0 + 8).

It is not an unprimeable number, because it can be changed into a prime (686050301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9528441 + ... + 9528512.

Almost surely, 2^686050308 is an apocalyptic number.

It is an amenable number.

686050308 is an abundant number, since it is smaller than the sum of its proper divisors (1048132506).

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

686050308 is a wasteful number, since it uses less digits than its factorization.

686050308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19056963 (or 19056958 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 686050308 is about 26192.5620739934. The cubic root of 686050308 is about 881.9662936199.

The spelling of 686050308 in words is "six hundred eighty-six million, fifty thousand, three hundred eight".