67989918 has 32 divisors (see below), whose sum is σ = 139470336. Its totient is φ = 22085888.

The previous prime is 67989907. The next prime is 67989959. The reversal of 67989918 is 81998976.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 99205 + ... + 99887.

It is an arithmetic number, because the mean of its divisors is an integer number (4358448).

Almost surely, 2^67989918 is an apocalyptic number.

67989918 is an abundant number, since it is smaller than the sum of its proper divisors (71480418).

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

67989918 is a wasteful number, since it uses less digits than its factorization.

67989918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088.

The product of its digits is 1959552, while the sum is 57.

The square root of 67989918 is about 8245.5999175318. The cubic root of 67989918 is about 408.1453370149.

The spelling of 67989918 in words is "sixty-seven million, nine hundred eighty-nine thousand, nine hundred eighteen".