68281028 has 6 divisors (see below), whose sum is σ = 119491806. Its totient is φ = 34140512.

The previous prime is 68281009. The next prime is 68281063. The reversal of 68281028 is 82018286.

It can be written as a sum of positive squares in only one way, i.e., 67930564 + 350464 = 8242^2 + 592^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8535125 + ... + 8535132.

It is an arithmetic number, because the mean of its divisors is an integer number (19915301).

Almost surely, 2^68281028 is an apocalyptic number.

It is an amenable number.

68281028 is a deficient number, since it is larger than the sum of its proper divisors (51210778).

68281028 is a wasteful number, since it uses less digits than its factorization.

68281028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17070261 (or 17070259 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 68281028 is about 8263.2335075320. The cubic root of 68281028 is about 408.7270213744.

The spelling of 68281028 in words is "sixty-eight million, two hundred eighty-one thousand, twenty-eight".