686157282 has 12 divisors (see below), whose sum is σ = 1486674150. Its totient is φ = 228719088.

The previous prime is 686157257. The next prime is 686157287. The reversal of 686157282 is 282751686.

686157282 is a `hidden beast` number, since 6 + 8 + 615 + 7 + 28 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 373610241 + 312547041 = 19329^2 + 17679^2 .

It is not an unprimeable number, because it can be changed into a prime (686157287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19059907 + ... + 19059942.

Almost surely, 2^686157282 is an apocalyptic number.

686157282 is an abundant number, since it is smaller than the sum of its proper divisors (800516868).

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

686157282 is a wasteful number, since it uses less digits than its factorization.

686157282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38119857 (or 38119854 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 686157282 is about 26194.6040626691. The cubic root of 686157282 is about 882.0121321237.

The spelling of 686157282 in words is "six hundred eighty-six million, one hundred fifty-seven thousand, two hundred eighty-two".