686830500 has 72 divisors (see below), whose sum is σ = 2166735480. Its totient is φ = 183153600.

The previous prime is 686830489. The next prime is 686830559. The reversal of 686830500 is 5038686.

686830500 is a `hidden beast` number, since 68 + 68 + 30 + 500 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9998244 + 676832256 = 3162^2 + 26016^2 .

It is a super-2 number, since 2×686830500² = 943472271460500000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 71815 + ... + 80814.

Almost surely, 2^686830500 is an apocalyptic number.

686830500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

686830500 is an abundant number, since it is smaller than the sum of its proper divisors (1479904980).

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

686830500 is a wasteful number, since it uses less digits than its factorization.

686830500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152654 (or 152639 counting only the distinct ones).

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

The square root of 686830500 is about 26207.4512305184. The cubic root of 686830500 is about 882.3004976673.

The spelling of 686830500 in words is "six hundred eighty-six million, eight hundred thirty thousand, five hundred".