7270220728 has 32 divisors (see below), whose sum is σ = 13896198000. Its totient is φ = 3564640768.

The previous prime is 7270220723. The next prime is 7270220759. The reversal of 7270220728 is 8270220727.

It is a super-2 number, since 2×7270220728² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7270220723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1141200 + ... + 1147552.

Almost surely, 2^7270220728 is an apocalyptic number.

It is an amenable number.

7270220728 is a deficient number, since it is larger than the sum of its proper divisors (6625977272).

7270220728 is a wasteful number, since it uses less digits than its factorization.

7270220728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9111 (or 9107 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 7270220728 is about 85265.5893546746. The cubic root of 7270220728 is about 1937.2360050881.

Subtracting 7270220728 from its reverse (8270220727), we obtain a palindrome (999999999).

The spelling of 7270220728 in words is "seven billion, two hundred seventy million, two hundred twenty thousand, seven hundred twenty-eight".