73218318 has 8 divisors (see below), whose sum is σ = 146436648. Its totient is φ = 24406104.

The previous prime is 73218317. The next prime is 73218319. The reversal of 73218318 is 81381237.

It is an interprime number because it is at equal distance from previous prime (73218317) and next prime (73218319).

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

73218318 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73218317) by changing a digit.

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, 6101521 + ... + 6101532.

It is an arithmetic number, because the mean of its divisors is an integer number (18304581).

Almost surely, 2^73218318 is an apocalyptic number.

73218318 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.

73218318 is a wasteful number, since it uses less digits than its factorization.

73218318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12203058.

The product of its digits is 8064, while the sum is 33.

The square root of 73218318 is about 8556.7703019305. The cubic root of 73218318 is about 418.3501374004.

It can be divided in two parts, 73218 and 318, that added together give a triangular number (73536 = T₃₈₃).

The spelling of 73218318 in words is "seventy-three million, two hundred eighteen thousand, three hundred eighteen".