68611728 has 80 divisors (see below), whose sum is σ = 191773440. Its totient is φ = 21055488.

The previous prime is 68611663. The next prime is 68611729. The reversal of 68611728 is 82711686.

It is not an unprimeable number, because it can be changed into a prime (68611729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37458 + ... + 39246.

It is an arithmetic number, because the mean of its divisors is an integer number (2397168).

Almost surely, 2^68611728 is an apocalyptic number.

68611728 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68611728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95886720).

68611728 is an abundant number, since it is smaller than the sum of its proper divisors (123161712).

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

68611728 is a wasteful number, since it uses less digits than its factorization.

68611728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864 (or 1858 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 68611728 is about 8283.2196638747. The cubic root of 68611728 is about 409.3858105103.

It can be divided in two parts, 686 and 11728, that multiplied together give a palindrome (8045408).

The spelling of 68611728 in words is "sixty-eight million, six hundred eleven thousand, seven hundred twenty-eight".