728025224 has 8 divisors (see below), whose sum is σ = 1365047310. Its totient is φ = 364012608.

The previous prime is 728025169. The next prime is 728025227. The reversal of 728025224 is 422520827.

It can be written as a sum of positive squares in only one way, i.e., 701296324 + 26728900 = 26482^2 + 5170^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (728025227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45501569 + ... + 45501584.

Almost surely, 2^728025224 is an apocalyptic number.

It is an amenable number.

728025224 is a deficient number, since it is larger than the sum of its proper divisors (637022086).

728025224 is a wasteful number, since it uses less digits than its factorization.

728025224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91003159 (or 91003155 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 728025224 is about 26981.9425542343. The cubic root of 728025224 is about 899.5986786855.

The spelling of 728025224 in words is "seven hundred twenty-eight million, twenty-five thousand, two hundred twenty-four".