28051825 has 12 divisors (see below), whose sum is σ = 34997760. Its totient is φ = 22303760.

The previous prime is 28051823. The next prime is 28051861. The reversal of 28051825 is 52815082.

It is not a de Polignac number, because 28051825 - 2¹ = 28051823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28051823) 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 11 ways as a sum of consecutive naturals, for example, 816 + ... + 7534.

It is an arithmetic number, because the mean of its divisors is an integer number (2916480).

Almost surely, 2^28051825 is an apocalyptic number.

28051825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28051825 is a deficient number, since it is larger than the sum of its proper divisors (6945935).

28051825 is a wasteful number, since it uses less digits than its factorization.

28051825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6896 (or 6891 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 28051825 is about 5296.3973604706. The cubic root of 28051825 is about 303.8461284147.

The spelling of 28051825 in words is "twenty-eight million, fifty-one thousand, eight hundred twenty-five".