73000220 has 24 divisors (see below), whose sum is σ = 154793184. Its totient is φ = 28915776.

The previous prime is 73000217. The next prime is 73000237. The reversal of 73000220 is 2200037.

It is a junction number, because it is equal to n+sod(n) for n = 73000195 and 73000204.

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 7 ways as a sum of consecutive naturals, for example, 15659 + ... + 19778.

It is an arithmetic number, because the mean of its divisors is an integer number (6449716).

Almost surely, 2^73000220 is an apocalyptic number.

It is an amenable number.

73000220 is an abundant number, since it is smaller than the sum of its proper divisors (81792964).

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

73000220 is a wasteful number, since it uses less digits than its factorization.

73000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35549 (or 35547 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 73000220 is about 8544.0166198340. The cubic root of 73000220 is about 417.9343394800.

Adding to 73000220 its reverse (2200037), we get a palindrome (75200257).

The spelling of 73000220 in words is "seventy-three million, two hundred twenty", and thus it is an aban number.