68307312 has 80 divisors (see below), whose sum is σ = 184050720. Its totient is φ = 21811200.

The previous prime is 68307311. The next prime is 68307359. The reversal of 68307312 is 21370386.

It is a self number, because there is not a number n which added to its sum of digits gives 68307312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68307311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119764 + ... + 120332.

It is an arithmetic number, because the mean of its divisors is an integer number (2300634).

Almost surely, 2^68307312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68307312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92025360).

68307312 is an abundant number, since it is smaller than the sum of its proper divisors (115743408).

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

68307312 is a wasteful number, since it uses less digits than its factorization.

68307312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 68307312 is about 8264.8237730759. The cubic root of 68307312 is about 408.7794595756.

Adding to 68307312 its reverse (21370386), we get a palindrome (89677698).

The spelling of 68307312 in words is "sixty-eight million, three hundred seven thousand, three hundred twelve".