68243680 has 96 divisors (see below), whose sum is σ = 168412608. Its totient is φ = 26112000.

The previous prime is 68243657. The next prime is 68243717. The reversal of 68243680 is 8634286.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 662509 + ... + 662611.

It is an arithmetic number, because the mean of its divisors is an integer number (1754298).

Almost surely, 2^68243680 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 68243680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84206304).

68243680 is an abundant number, since it is smaller than the sum of its proper divisors (100168928).

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

68243680 is a wasteful number, since it uses less digits than its factorization.

68243680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 68243680 is about 8260.9733082731. The cubic root of 68243680 is about 408.6524866595.

The spelling of 68243680 in words is "sixty-eight million, two hundred forty-three thousand, six hundred eighty".