686275712 has 32 divisors (see below), whose sum is σ = 1400546700. Its totient is φ = 334766080.

The previous prime is 686275631. The next prime is 686275783. The reversal of 686275712 is 217572686.

It can be written as a sum of positive squares in 2 ways, for example, as 502835776 + 183439936 = 22424^2 + 13544^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×686275712² = 941948705762213888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60137 + ... + 70632.

Almost surely, 2^686275712 is an apocalyptic number.

It is an amenable number.

686275712 is an abundant number, since it is smaller than the sum of its proper divisors (714270988).

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

686275712 is a wasteful number, since it uses less digits than its factorization.

686275712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130824 (or 130812 counting only the distinct ones).

The product of its digits is 282240, while the sum is 44.

The square root of 686275712 is about 26196.8645452085. The cubic root of 686275712 is about 882.0628739824.

The spelling of 686275712 in words is "six hundred eighty-six million, two hundred seventy-five thousand, seven hundred twelve".