685768212 has 36 divisors (see below), whose sum is σ = 1780323636. Its totient is φ = 222410880.

The previous prime is 685768201. The next prime is 685768217. The reversal of 685768212 is 212867586.

685768212 is a `hidden beast` number, since 68 + 576 + 8 + 2 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 533887236 + 151880976 = 23106^2 + 12324^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685768217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256089 + ... + 258752.

Almost surely, 2^685768212 is an apocalyptic number.

It is an amenable number.

685768212 is an abundant number, since it is smaller than the sum of its proper divisors (1094555424).

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

685768212 is a wasteful number, since it uses less digits than its factorization.

685768212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514888 (or 514883 counting only the distinct ones).

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

The square root of 685768212 is about 26187.1764801019. The cubic root of 685768212 is about 881.8453922469.

The spelling of 685768212 in words is "six hundred eighty-five million, seven hundred sixty-eight thousand, two hundred twelve".