28327825 has 12 divisors (see below), whose sum is σ = 35271180. Its totient is φ = 22568960.

The previous prime is 28327823. The next prime is 28327837. The reversal of 28327825 is 52872382.

28327825 = T₄₀ + T₄₁ + ... + T₅₅₃.

It can be written as a sum of positive squares in 6 ways, for example, as 121104 + 28206721 = 348^2 + 5311^2 .

It is not a de Polignac number, because 28327825 - 2¹ = 28327823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28327823) 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 11 ways as a sum of consecutive naturals, for example, 4221 + ... + 8629.

It is an arithmetic number, because the mean of its divisors is an integer number (2939265).

Almost surely, 2^28327825 is an apocalyptic number.

28327825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28327825 is a deficient number, since it is larger than the sum of its proper divisors (6943355).

28327825 is a wasteful number, since it uses less digits than its factorization.

28327825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4676 (or 4671 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 28327825 is about 5322.3890312528. The cubic root of 28327825 is about 304.8393851107.

The spelling of 28327825 in words is "twenty-eight million, three hundred twenty-seven thousand, eight hundred twenty-five".