73444220 has 48 divisors (see below), whose sum is σ = 158397120. Its totient is φ = 28594176.

The previous prime is 73444219. The next prime is 73444249. The reversal of 73444220 is 2244437.

It is a self number, because there is not a number n which added to its sum of digits gives 73444220.

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, 204401 + ... + 204759.

It is an arithmetic number, because the mean of its divisors is an integer number (3299940).

Almost surely, 2^73444220 is an apocalyptic number.

It is an amenable number.

73444220 is an abundant number, since it is smaller than the sum of its proper divisors (84952900).

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

73444220 is a wasteful number, since it uses less digits than its factorization.

73444220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 73444220 is about 8569.9603266293. The cubic root of 73444220 is about 418.7799438007.

Adding to 73444220 its reverse (2244437), we get a palindrome (75688657).

The spelling of 73444220 in words is "seventy-three million, four hundred forty-four thousand, two hundred twenty".