68217856 has 88 divisors (see below), whose sum is σ = 161401856. Its totient is φ = 28200960.

The previous prime is 68217841. The next prime is 68217871. The reversal of 68217856 is 65871286.

It is an interprime number because it is at equal distance from previous prime (68217841) and next prime (68217871).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222055 + ... + 222361.

It is an arithmetic number, because the mean of its divisors is an integer number (1834112).

Almost surely, 2^68217856 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 68217856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80700928).

68217856 is an abundant number, since it is smaller than the sum of its proper divisors (93184000).

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

68217856 is a wasteful number, since it uses less digits than its factorization.

68217856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 347 counting only the distinct ones).

The product of its digits is 161280, while the sum is 43.

The square root of 68217856 is about 8259.4101484307. The cubic root of 68217856 is about 408.6009342754.

The spelling of 68217856 in words is "sixty-eight million, two hundred seventeen thousand, eight hundred fifty-six".