686280305442 has 32 divisors (see below), whose sum is σ = 1377367136640. Its totient is φ = 227960288640.

The previous prime is 686280305437. The next prime is 686280305443. The reversal of 686280305442 is 244503082686.

It is a junction number, because it is equal to n+sod(n) for n = 686280305391 and 686280305400.

It is not an unprimeable number, because it can be changed into a prime (686280305443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2003838 + ... + 2321190.

It is an arithmetic number, because the mean of its divisors is an integer number (43042723020).

Almost surely, 2^686280305442 is an apocalyptic number.

686280305442 is an abundant number, since it is smaller than the sum of its proper divisors (691086831198).

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

686280305442 is a wasteful number, since it uses less digits than its factorization.

686280305442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318618.

The product of its (nonzero) digits is 2211840, while the sum is 48.

The spelling of 686280305442 in words is "six hundred eighty-six billion, two hundred eighty million, three hundred five thousand, four hundred forty-two".