28805425 has 48 divisors (see below), whose sum is σ = 42408000. Its totient is φ = 19180800.

The previous prime is 28805423. The next prime is 28805431. The reversal of 28805425 is 52450882.

It is not a de Polignac number, because 28805425 - 2¹ = 28805423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28805423) 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 47 ways as a sum of consecutive naturals, for example, 193251 + ... + 193399.

It is an arithmetic number, because the mean of its divisors is an integer number (883500).

Almost surely, 2^28805425 is an apocalyptic number.

28805425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28805425 is a deficient number, since it is larger than the sum of its proper divisors (13602575).

28805425 is a wasteful number, since it uses less digits than its factorization.

28805425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 28805425 is about 5367.0685667317. The cubic root of 28805425 is about 306.5430181781.

The spelling of 28805425 in words is "twenty-eight million, eight hundred five thousand, four hundred twenty-five".