68408218 has 8 divisors (see below), whose sum is σ = 104795712. Its totient is φ = 33476316.

The previous prime is 68408191. The next prime is 68408239. The reversal of 68408218 is 81280486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363780 + ... + 363967.

It is an arithmetic number, because the mean of its divisors is an integer number (13099464).

Almost surely, 2^68408218 is an apocalyptic number.

68408218 is a deficient number, since it is larger than the sum of its proper divisors (36387494).

68408218 is a wasteful number, since it uses less digits than its factorization.

68408218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727796.

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 68408218 is about 8270.9260666506. The cubic root of 68408218 is about 408.9806484110.

The spelling of 68408218 in words is "sixty-eight million, four hundred eight thousand, two hundred eighteen".