686458212 has 24 divisors (see below), whose sum is σ = 1747348512. Its totient is φ = 208017600.

The previous prime is 686458211. The next prime is 686458237. The reversal of 686458212 is 212854686.

It is not an unprimeable number, because it can be changed into a prime (686458211) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2600089 + ... + 2600352.

It is an arithmetic number, because the mean of its divisors is an integer number (72806188).

Almost surely, 2^686458212 is an apocalyptic number.

It is an amenable number.

686458212 is an abundant number, since it is smaller than the sum of its proper divisors (1060890300).

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

686458212 is a wasteful number, since it uses less digits than its factorization.

686458212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5200459 (or 5200457 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 686458212 is about 26200.3475549467. The cubic root of 686458212 is about 882.1410554890.

The spelling of 686458212 in words is "six hundred eighty-six million, four hundred fifty-eight thousand, two hundred twelve".