73022720 has 72 divisors (see below), whose sum is σ = 177153480. Its totient is φ = 28835840.

The previous prime is 73022717. The next prime is 73022737. The reversal of 73022720 is 2722037.

It can be written as a sum of positive squares in 4 ways, for example, as 10549504 + 62473216 = 3248^2 + 7904^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113600 + ... + 114240.

It is an arithmetic number, because the mean of its divisors is an integer number (2460465).

Almost surely, 2^73022720 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 73022720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88576740).

73022720 is an abundant number, since it is smaller than the sum of its proper divisors (104130760).

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

73022720 is an equidigital number, since it uses as much as digits as its factorization.

73022720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 23.

The square root of 73022720 is about 8545.3332293129. Note that the first 3 decimals coincide. The cubic root of 73022720 is about 417.9772733994.

Adding to 73022720 its reverse (2722037), we get a palindrome (75744757).

The spelling of 73022720 in words is "seventy-three million, twenty-two thousand, seven hundred twenty".