28282825 has 18 divisors (see below), whose sum is σ = 36000362. Its totient is φ = 22041600.

The previous prime is 28282823. The next prime is 28282829. The reversal of 28282825 is 52828282.

It can be written as a sum of positive squares in 9 ways, for example, as 24314761 + 3968064 = 4931^2 + 1992^2 .

It is not a de Polignac number, because 28282825 - 2¹ = 28282823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28282823) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 41689 + ... + 42361.

Almost surely, 2^28282825 is an apocalyptic number.

28282825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28282825 is a deficient number, since it is larger than the sum of its proper divisors (7717537).

28282825 is an equidigital number, since it uses as much as digits as its factorization.

28282825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765 (or 719 counting only the distinct ones).

The product of its digits is 40960, while the sum is 37.

The square root of 28282825 is about 5318.1599261399. The cubic root of 28282825 is about 304.6778826243.

The spelling of 28282825 in words is "twenty-eight million, two hundred eighty-two thousand, eight hundred twenty-five".