68680312 has 8 divisors (see below), whose sum is σ = 128775600. Its totient is φ = 34340152.

The previous prime is 68680291. The next prime is 68680319. The reversal of 68680312 is 21308686.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68680319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4292512 + ... + 4292527.

It is an arithmetic number, because the mean of its divisors is an integer number (16096950).

Almost surely, 2^68680312 is an apocalyptic number.

It is an amenable number.

68680312 is a deficient number, since it is larger than the sum of its proper divisors (60095288).

68680312 is a wasteful number, since it uses less digits than its factorization.

68680312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8585045 (or 8585041 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 68680312 is about 8287.3585659123. The cubic root of 68680312 is about 409.5221718736.

Adding to 68680312 its reverse (21308686), we get a palindrome (89988998).

The spelling of 68680312 in words is "sixty-eight million, six hundred eighty thousand, three hundred twelve".