28003325 has 12 divisors (see below), whose sum is σ = 39684960. Its totient is φ = 19202160.

The previous prime is 28003319. The next prime is 28003343. The reversal of 28003325 is 52330082.

It is not a de Polignac number, because 28003325 - 2⁴ = 28003309 is a prime.

It is a super-2 number, since 2×28003325² = 1568372422111250, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28003325.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79835 + ... + 80184.

It is an arithmetic number, because the mean of its divisors is an integer number (3307080).

Almost surely, 2^28003325 is an apocalyptic number.

28003325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28003325 is a deficient number, since it is larger than the sum of its proper divisors (11681635).

28003325 is a wasteful number, since it uses less digits than its factorization.

28003325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160036 (or 160031 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 28003325 is about 5291.8167957706. The cubic root of 28003325 is about 303.6709165432.

The spelling of 28003325 in words is "twenty-eight million, three thousand, three hundred twenty-five".