686485242 has 24 divisors (see below), whose sum is σ = 1490629140. Its totient is φ = 228329280.

The previous prime is 686485231. The next prime is 686485249. The reversal of 686485242 is 242584686.

686485242 is a `hidden beast` number, since 6 + 86 + 48 + 524 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 672935481 + 13549761 = 25941^2 + 3681^2 .

It is not an unprimeable number, because it can be changed into a prime (686485249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33067 + ... + 49662.

Almost surely, 2^686485242 is an apocalyptic number.

686485242 is an abundant number, since it is smaller than the sum of its proper divisors (804143898).

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

686485242 is a wasteful number, since it uses less digits than its factorization.

686485242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83198 (or 83195 counting only the distinct ones).

The product of its digits is 737280, while the sum is 45.

The square root of 686485242 is about 26200.8633827208. The cubic root of 686485242 is about 882.1526337416.

The spelling of 686485242 in words is "six hundred eighty-six million, four hundred eighty-five thousand, two hundred forty-two".