68308128 has 144 divisors (see below), whose sum is σ = 229372416. Its totient is φ = 18869760.

The previous prime is 68308117. The next prime is 68308147. The reversal of 68308128 is 82180386.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 68308092 and 68308101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61950 + ... + 63042.

It is an arithmetic number, because the mean of its divisors is an integer number (1592864).

Almost surely, 2^68308128 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 68308128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114686208).

68308128 is an abundant number, since it is smaller than the sum of its proper divisors (161064288).

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

68308128 is a wasteful number, since it uses less digits than its factorization.

68308128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147 (or 1136 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 68308128 is about 8264.8731387723. The cubic root of 68308128 is about 408.7810873306.

The spelling of 68308128 in words is "sixty-eight million, three hundred eight thousand, one hundred twenty-eight".