73061220 has 24 divisors (see below), whose sum is σ = 204571584. Its totient is φ = 19482976.

The previous prime is 73061159. The next prime is 73061231. The reversal of 73061220 is 2216037.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 608784 + ... + 608903.

It is an arithmetic number, because the mean of its divisors is an integer number (8523816).

Almost surely, 2^73061220 is an apocalyptic number.

It is an amenable number.

73061220 is an abundant number, since it is smaller than the sum of its proper divisors (131510364).

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

73061220 is a wasteful number, since it uses less digits than its factorization.

73061220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217699 (or 1217697 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 73061220 is about 8547.5856240227. The cubic root of 73061220 is about 418.0507176542.

Adding to 73061220 its reverse (2216037), we get a palindrome (75277257).

The spelling of 73061220 in words is "seventy-three million, sixty-one thousand, two hundred twenty".