68628218 has 24 divisors (see below), whose sum is σ = 110703348. Its totient is φ = 31797632.

The previous prime is 68628101. The next prime is 68628221. The reversal of 68628218 is 81282686.

It can be written as a sum of positive squares in 2 ways, for example, as 57047809 + 11580409 = 7553^2 + 3403^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234080 + ... + 234372.

Almost surely, 2^68628218 is an apocalyptic number.

68628218 is a deficient number, since it is larger than the sum of its proper divisors (42075130).

68628218 is a wasteful number, since it uses less digits than its factorization.

68628218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 395 counting only the distinct ones).

The product of its digits is 73728, while the sum is 41.

The square root of 68628218 is about 8284.2149899674. The cubic root of 68628218 is about 409.4186048613.

The spelling of 68628218 in words is "sixty-eight million, six hundred twenty-eight thousand, two hundred eighteen".