28230325 has 6 divisors (see below), whose sum is σ = 35005634. Its totient is φ = 22584240.

The previous prime is 28230299. The next prime is 28230329. The reversal of 28230325 is 52303282.

It can be written as a sum of positive squares in 3 ways, for example, as 9229444 + 19000881 = 3038^2 + 4359^2 .

It is not a de Polignac number, because 28230325 - 2⁷ = 28230197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 1129213 = 28230325 / (2 + 8 + 2 + 3 + 0 + 3 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28230325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28230329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 564582 + ... + 564631.

Almost surely, 2^28230325 is an apocalyptic number.

28230325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28230325 is a deficient number, since it is larger than the sum of its proper divisors (6775309).

28230325 is a wasteful number, since it uses less digits than its factorization.

28230325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129223 (or 1129218 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 28230325 is about 5313.2217156825. The cubic root of 28230325 is about 304.4892463957.

The spelling of 28230325 in words is "twenty-eight million, two hundred thirty thousand, three hundred twenty-five".