73218884 has 6 divisors (see below), whose sum is σ = 128133054. Its totient is φ = 36609440.

The previous prime is 73218883. The next prime is 73218947. The reversal of 73218884 is 48881237.

It can be written as a sum of positive squares in only one way, i.e., 46922500 + 26296384 = 6850^2 + 5128^2 .

It is a super-2 number, since 2×73218884² = 10722009948410912, which contains 22 as substring.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (73218883) 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 as a sum of consecutive naturals, namely, 9152357 + ... + 9152364.

It is an arithmetic number, because the mean of its divisors is an integer number (21355509).

Almost surely, 2^73218884 is an apocalyptic number.

It is an amenable number.

73218884 is a deficient number, since it is larger than the sum of its proper divisors (54914170).

73218884 is a wasteful number, since it uses less digits than its factorization.

73218884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18304725 (or 18304723 counting only the distinct ones).

The product of its digits is 86016, while the sum is 41.

The square root of 73218884 is about 8556.8033750928. The cubic root of 73218884 is about 418.3512153891.

The spelling of 73218884 in words is "seventy-three million, two hundred eighteen thousand, eight hundred eighty-four".