68159728 has 80 divisors (see below), whose sum is σ = 164086720. Its totient is φ = 26866944.

The previous prime is 68159659. The next prime is 68159737. The reversal of 68159728 is 82795186.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 245926 + ... + 246202.

It is an arithmetic number, because the mean of its divisors is an integer number (2051084).

Almost surely, 2^68159728 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 68159728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82043360).

68159728 is an abundant number, since it is smaller than the sum of its proper divisors (95926992).

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

68159728 is a wasteful number, since it uses less digits than its factorization.

68159728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 299 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The square root of 68159728 is about 8255.8905031499. The cubic root of 68159728 is about 408.4848458797.

The spelling of 68159728 in words is "sixty-eight million, one hundred fifty-nine thousand, seven hundred twenty-eight".