73120220 has 48 divisors (see below), whose sum is σ = 164179008. Its totient is φ = 27287040.

The previous prime is 73120219. The next prime is 73120237. The reversal of 73120220 is 2202137.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16922 + ... + 20798.

It is an arithmetic number, because the mean of its divisors is an integer number (3420396).

Almost surely, 2^73120220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73120220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82089504).

73120220 is an abundant number, since it is smaller than the sum of its proper divisors (91058788).

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

73120220 is a wasteful number, since it uses less digits than its factorization.

73120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3950 (or 3948 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 73120220 is about 8551.0361945205. The cubic root of 73120220 is about 418.1632185403.

Adding to 73120220 its reverse (2202137), we get a palindrome (75322357).

The spelling of 73120220 in words is "seventy-three million, one hundred twenty thousand, two hundred twenty".