7270728 has 32 divisors (see below), whose sum is σ = 18243360. Its totient is φ = 2414720.

The previous prime is 7270721. The next prime is 7270733. The reversal of 7270728 is 8270727.

It is a happy number.

7270728 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7270721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11476 + ... + 12092.

It is an arithmetic number, because the mean of its divisors is an integer number (570105).

Almost surely, 2^7270728 is an apocalyptic number.

It is an amenable number.

7270728 is an abundant number, since it is smaller than the sum of its proper divisors (10972632).

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

7270728 is a wasteful number, since it uses less digits than its factorization.

7270728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 33.

The square root of 7270728 is about 2696.4287492904. The cubic root of 7270728 is about 193.7281060241.

Subtracting 7270728 from its reverse (8270727), we obtain a palindrome (999999).

The spelling of 7270728 in words is "seven million, two hundred seventy thousand, seven hundred twenty-eight".