7273530820 has 12 divisors (see below), whose sum is σ = 15274414764. Its totient is φ = 2909412320.

The previous prime is 7273530779. The next prime is 7273530829. The reversal of 7273530820 is 280353727.

It can be written as a sum of positive squares in 2 ways, for example, as 4670082244 + 2603448576 = 68338^2 + 51024^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7273530820.

It is not an unprimeable number, because it can be changed into a prime (7273530829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181838251 + ... + 181838290.

It is an arithmetic number, because the mean of its divisors is an integer number (1272867897).

Almost surely, 2^7273530820 is an apocalyptic number.

It is an amenable number.

7273530820 is an abundant number, since it is smaller than the sum of its proper divisors (8000883944).

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

7273530820 is a wasteful number, since it uses less digits than its factorization.

7273530820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363676550 (or 363676548 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 7273530820 is about 85284.9976256082. The cubic root of 7273530820 is about 1937.5299648227.

The spelling of 7273530820 in words is "seven billion, two hundred seventy-three million, five hundred thirty thousand, eight hundred twenty".