28130325 has 24 divisors (see below), whose sum is σ = 49246848. Its totient is φ = 14119680.

The previous prime is 28130321. The next prime is 28130327. The reversal of 28130325 is 52303182.

It is not a de Polignac number, because 28130325 - 2² = 28130321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28130295 and 28130304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28130321) 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 23 ways as a sum of consecutive naturals, for example, 9757 + ... + 12306.

It is an arithmetic number, because the mean of its divisors is an integer number (2051952).

Almost surely, 2^28130325 is an apocalyptic number.

28130325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28130325 is a deficient number, since it is larger than the sum of its proper divisors (21116523).

28130325 is a wasteful number, since it uses less digits than its factorization.

28130325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22093 (or 22088 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 28130325 is about 5303.8028809525. The cubic root of 28130325 is about 304.1292912938.

The spelling of 28130325 in words is "twenty-eight million, one hundred thirty thousand, three hundred twenty-five".