7255728 has 30 divisors (see below), whose sum is σ = 20306364. Its totient is φ = 2418528.

The previous prime is 7255727. The next prime is 7255733. The reversal of 7255728 is 8275527.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 7255692 and 7255701.

It is not an unprimeable number, because it can be changed into a prime (7255723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25050 + ... + 25337.

Almost surely, 2^7255728 is an apocalyptic number.

It is an amenable number.

7255728 is an abundant number, since it is smaller than the sum of its proper divisors (13050636).

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

7255728 is a wasteful number, since it uses less digits than its factorization.

7255728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50401 (or 50392 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 7255728 is about 2693.6458564555. The cubic root of 7255728 is about 193.5947896055.

The spelling of 7255728 in words is "seven million, two hundred fifty-five thousand, seven hundred twenty-eight".