28089125 has 16 divisors (see below), whose sum is σ = 36903360. Its totient is φ = 21286800.

The previous prime is 28089121. The next prime is 28089169. The reversal of 28089125 is 52198082.

It is not a de Polignac number, because 28089125 - 2² = 28089121 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28089121) 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 15 ways as a sum of consecutive naturals, for example, 3539 + ... + 8288.

It is an arithmetic number, because the mean of its divisors is an integer number (2306460).

Almost surely, 2^28089125 is an apocalyptic number.

28089125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28089125 is a deficient number, since it is larger than the sum of its proper divisors (8814235).

28089125 is a wasteful number, since it uses less digits than its factorization.

28089125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11861 (or 11851 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 28089125 is about 5299.9174521873. The cubic root of 28089125 is about 303.9807416528.

The spelling of 28089125 in words is "twenty-eight million, eighty-nine thousand, one hundred twenty-five".