73280220 has 48 divisors (see below), whose sum is σ = 220970400. Its totient is φ = 18038016.

The previous prime is 73280189. The next prime is 73280237. The reversal of 73280220 is 2208237.

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, 46195 + ... + 47754.

It is an arithmetic number, because the mean of its divisors is an integer number (4603550).

Almost surely, 2^73280220 is an apocalyptic number.

It is an amenable number.

73280220 is an abundant number, since it is smaller than the sum of its proper divisors (147690180).

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

73280220 is a wasteful number, since it uses less digits than its factorization.

73280220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93974 (or 93972 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 73280220 is about 8560.3866735096. The cubic root of 73280220 is about 418.4680014189.

Adding to 73280220 its reverse (2208237), we get a palindrome (75488457).

The spelling of 73280220 in words is "seventy-three million, two hundred eighty thousand, two hundred twenty".