68443856 has 40 divisors (see below), whose sum is σ = 143990784. Its totient is φ = 31328640.

The previous prime is 68443847. The next prime is 68443873. The reversal of 68443856 is 65834486.

It is a super-2 number, since 2×68443856² = 9369122848297472, which contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 25121 + ... + 27711.

Almost surely, 2^68443856 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 68443856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71995392).

68443856 is an abundant number, since it is smaller than the sum of its proper divisors (75546928).

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

68443856 is a wasteful number, since it uses less digits than its factorization.

68443856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2739 (or 2733 counting only the distinct ones).

The product of its digits is 552960, while the sum is 44.

The square root of 68443856 is about 8273.0802002640. The cubic root of 68443856 is about 409.0516570435.

The spelling of 68443856 in words is "sixty-eight million, four hundred forty-three thousand, eight hundred fifty-six".