68190918 has 8 divisors (see below), whose sum is σ = 136381848. Its totient is φ = 22730304.

The previous prime is 68190907. The next prime is 68190923. The reversal of 68190918 is 81909186.

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

68190918 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 68190918.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5682571 + ... + 5682582.

It is an arithmetic number, because the mean of its divisors is an integer number (17047731).

Almost surely, 2^68190918 is an apocalyptic number.

68190918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

68190918 is a wasteful number, since it uses less digits than its factorization.

68190918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11365158.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 68190918 is about 8257.7792414184. The cubic root of 68190918 is about 408.5471441500.

The spelling of 68190918 in words is "sixty-eight million, one hundred ninety thousand, nine hundred eighteen".