28330825 has 24 divisors (see below), whose sum is σ = 37944000. Its totient is φ = 20919360.

The previous prime is 28330793. The next prime is 28330829. The reversal of 28330825 is 52803382.

It is not a de Polignac number, because 28330825 - 2⁵ = 28330793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28330829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15826 + ... + 17524.

It is an arithmetic number, because the mean of its divisors is an integer number (1581000).

Almost surely, 2^28330825 is an apocalyptic number.

28330825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28330825 is a deficient number, since it is larger than the sum of its proper divisors (9613175).

28330825 is a wasteful number, since it uses less digits than its factorization.

28330825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761 (or 1756 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 28330825 is about 5322.6708521193. The cubic root of 28330825 is about 304.8501458600.

The spelling of 28330825 in words is "twenty-eight million, three hundred thirty thousand, eight hundred twenty-five".