68136860 has 24 divisors (see below), whose sum is σ = 156095856. Its totient is φ = 24776960.

The previous prime is 68136847. The next prime is 68136877. The reversal of 68136860 is 6863186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154637 + ... + 155076.

It is an arithmetic number, because the mean of its divisors is an integer number (6503994).

Almost surely, 2^68136860 is an apocalyptic number.

It is an amenable number.

68136860 is an abundant number, since it is smaller than the sum of its proper divisors (87958996).

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

68136860 is a wasteful number, since it uses less digits than its factorization.

68136860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309733 (or 309731 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 68136860 is about 8254.5054364268. The cubic root of 68136860 is about 408.4391577263.

The spelling of 68136860 in words is "sixty-eight million, one hundred thirty-six thousand, eight hundred sixty".