68028638 has 16 divisors (see below), whose sum is σ = 103654080. Its totient is φ = 33480096.

The previous prime is 68028629. The next prime is 68028643. The reversal of 68028638 is 83682086.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68028595 and 68028604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87620 + ... + 88392.

It is an arithmetic number, because the mean of its divisors is an integer number (6478380).

Almost surely, 2^68028638 is an apocalyptic number.

68028638 is a deficient number, since it is larger than the sum of its proper divisors (35625442).

68028638 is a wasteful number, since it uses less digits than its factorization.

68028638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 68028638 is about 8247.9475022578. The cubic root of 68028638 is about 408.2228013845. Note that the first 3 decimals are identical.

The spelling of 68028638 in words is "sixty-eight million, twenty-eight thousand, six hundred thirty-eight".