686183040 has 96 divisors (see below), whose sum is σ = 2369495700. Its totient is φ = 182980608.

The previous prime is 686183023. The next prime is 686183051. The reversal of 686183040 is 40381686.

It is a happy number.

686183040 is a `hidden beast` number, since 6 + 8 + 618 + 30 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 584092224 + 102090816 = 24168^2 + 10104^2 .

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a junction number, because it is equal to n+sod(n) for n = 686182986 and 686183004.

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 11 ways as a sum of consecutive naturals, for example, 53805 + ... + 65324.

Almost surely, 2^686183040 is an apocalyptic number.

686183040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

686183040 is an abundant number, since it is smaller than the sum of its proper divisors (1683312660).

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

686183040 is a wasteful number, since it uses less digits than its factorization.

686183040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119154 (or 119139 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 686183040 is about 26195.0957242000. The cubic root of 686183040 is about 882.0231687498.

The spelling of 686183040 in words is "six hundred eighty-six million, one hundred eighty-three thousand, forty".