73642218 has 32 divisors (see below), whose sum is σ = 159014016. Its totient is φ = 22602048.

The previous prime is 73642199. The next prime is 73642243. The reversal of 73642218 is 81224637.

It is a Curzon 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, 38296 + ... + 40172.

It is an arithmetic number, because the mean of its divisors is an integer number (4969188).

Almost surely, 2^73642218 is an apocalyptic number.

73642218 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

73642218 is an abundant number, since it is smaller than the sum of its proper divisors (85371798).

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

73642218 is a wasteful number, since it uses less digits than its factorization.

73642218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398.

The product of its digits is 16128, while the sum is 33.

The square root of 73642218 is about 8581.5044135629. The cubic root of 73642218 is about 419.1559352234.

The spelling of 73642218 in words is "seventy-three million, six hundred forty-two thousand, two hundred eighteen".