68909508 has 24 divisors (see below), whose sum is σ = 178654560. Its totient is φ = 22969800.

The previous prime is 68909501. The next prime is 68909513. The reversal of 68909508 is 80590986.

It is not an unprimeable number, because it can be changed into a prime (68909501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318918 + ... + 319133.

It is an arithmetic number, because the mean of its divisors is an integer number (7443940).

Almost surely, 2^68909508 is an apocalyptic number.

It is an amenable number.

68909508 is an abundant number, since it is smaller than the sum of its proper divisors (109745052).

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

68909508 is a wasteful number, since it uses less digits than its factorization.

68909508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638064 (or 638056 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 68909508 is about 8301.1750975389. The cubic root of 68909508 is about 409.9772107103.

The spelling of 68909508 in words is "sixty-eight million, nine hundred nine thousand, five hundred eight".