74218218 has 32 divisors (see below), whose sum is σ = 156710400. Its totient is φ = 23368176.

The previous prime is 74218201. The next prime is 74218219. The reversal of 74218218 is 81281247.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (74218219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49305 + ... + 50787.

It is an arithmetic number, because the mean of its divisors is an integer number (4897200).

Almost surely, 2^74218218 is an apocalyptic number.

74218218 is an abundant number, since it is smaller than the sum of its proper divisors (82492182).

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

74218218 is a wasteful number, since it uses less digits than its factorization.

74218218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946.

The product of its digits is 7168, while the sum is 33.

The square root of 74218218 is about 8614.9995937319. Note that the first 3 decimals coincide. The cubic root of 74218218 is about 420.2459217375.

The spelling of 74218218 in words is "seventy-four million, two hundred eighteen thousand, two hundred eighteen".