68537868 has 72 divisors (see below), whose sum is σ = 187210800. Its totient is φ = 19458432.

The previous prime is 68537857. The next prime is 68537927. The reversal of 68537868 is 86873586.

It is a self number, because there is not a number n which added to its sum of digits gives 68537868.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134398 + ... + 134906.

It is an arithmetic number, because the mean of its divisors is an integer number (2600150).

Almost surely, 2^68537868 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 68537868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93605400).

68537868 is an abundant number, since it is smaller than the sum of its proper divisors (118672932).

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

68537868 is a wasteful number, since it uses less digits than its factorization.

68537868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759 (or 750 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The square root of 68537868 is about 8278.7600520851. The cubic root of 68537868 is about 409.2388575360.

The spelling of 68537868 in words is "sixty-eight million, five hundred thirty-seven thousand, eight hundred sixty-eight".