68711880 has 32 divisors (see below), whose sum is σ = 206136000. Its totient is φ = 18323136.

The previous prime is 68711861. The next prime is 68711887. The reversal of 68711880 is 8811786.

It is not an unprimeable number, because it can be changed into a prime (68711887) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 286180 + ... + 286419.

It is an arithmetic number, because the mean of its divisors is an integer number (6441750).

Almost surely, 2^68711880 is an apocalyptic number.

68711880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68711880 is an abundant number, since it is smaller than the sum of its proper divisors (137424120).

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

68711880 is a wasteful number, since it uses less digits than its factorization.

68711880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572613 (or 572609 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 39.

The square root of 68711880 is about 8289.2629346643. The cubic root of 68711880 is about 409.5849060854.

The spelling of 68711880 in words is "sixty-eight million, seven hundred eleven thousand, eight hundred eighty".