686828080 has 40 divisors (see below), whose sum is σ = 1603772352. Its totient is φ = 273544704.

The previous prime is 686828063. The next prime is 686828119. The reversal of 686828080 is 80828686.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×686828080² = 943465622952972800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 686828080.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217 + ... + 37063.

Almost surely, 2^686828080 is an apocalyptic number.

It is an amenable number.

686828080 is an abundant number, since it is smaller than the sum of its proper divisors (916944272).

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

686828080 is a wasteful number, since it uses less digits than its factorization.

686828080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37093 (or 37087 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 46.

The square root of 686828080 is about 26207.4050604023. The cubic root of 686828080 is about 882.2994614244.

The spelling of 686828080 in words is "six hundred eighty-six million, eight hundred twenty-eight thousand, eighty".