686828086 has 32 divisors (see below), whose sum is σ = 1200718080. Its totient is φ = 288558816.

The previous prime is 686828063. The next prime is 686828119. The reversal of 686828086 is 680828686.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364980 + ... + 366856.

It is an arithmetic number, because the mean of its divisors is an integer number (37522440).

Almost surely, 2^686828086 is an apocalyptic number.

686828086 is a deficient number, since it is larger than the sum of its proper divisors (513889994).

686828086 is a wasteful number, since it uses less digits than its factorization.

686828086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388.

The product of its (nonzero) digits is 1769472, while the sum is 52.

The square root of 686828086 is about 26207.4051748738. The cubic root of 686828086 is about 882.2994639936.

The spelling of 686828086 in words is "six hundred eighty-six million, eight hundred twenty-eight thousand, eighty-six".