685412712 has 32 divisors (see below), whose sum is σ = 1903924800. Its totient is φ = 228470832.

The previous prime is 685412711. The next prime is 685412729. The reversal of 685412712 is 217214586.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (685412711) 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, 1586388 + ... + 1586819.

It is an arithmetic number, because the mean of its divisors is an integer number (59497650).

Almost surely, 2^685412712 is an apocalyptic number.

It is an amenable number.

685412712 is an abundant number, since it is smaller than the sum of its proper divisors (1218512088).

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

685412712 is a wasteful number, since it uses less digits than its factorization.

685412712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3173222 (or 3173212 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 685412712 is about 26180.3879268433. The cubic root of 685412712 is about 881.6929839848.

It can be divided in two parts, 68541 and 2712, that added together give a triangular number (71253 = T₃₇₇).

The spelling of 685412712 in words is "six hundred eighty-five million, four hundred twelve thousand, seven hundred twelve".