686089678 has 16 divisors (see below), whose sum is σ = 1077981696. Its totient is φ = 326876440.

The previous prime is 686089673. The next prime is 686089681. The reversal of 686089678 is 876980686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686089673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16258 + ... + 40453.

It is an arithmetic number, because the mean of its divisors is an integer number (67373856).

Almost surely, 2^686089678 is an apocalyptic number.

686089678 is a deficient number, since it is larger than the sum of its proper divisors (391892018).

686089678 is a wasteful number, since it uses less digits than its factorization.

686089678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56999.

The product of its (nonzero) digits is 6967296, while the sum is 58.

The square root of 686089678 is about 26193.3136124470. The cubic root of 686089678 is about 881.9831642723.

The spelling of 686089678 in words is "six hundred eighty-six million, eighty-nine thousand, six hundred seventy-eight".