28382825 has 24 divisors (see below), whose sum is σ = 37069056. Its totient is φ = 21528000.

The previous prime is 28382821. The next prime is 28382833. The reversal of 28382825 is 52828382.

It is not a de Polignac number, because 28382825 - 2² = 28382821 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28382821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40730 + ... + 41420.

It is an arithmetic number, because the mean of its divisors is an integer number (1544544).

Almost surely, 2^28382825 is an apocalyptic number.

28382825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28382825 is a deficient number, since it is larger than the sum of its proper divisors (8686231).

28382825 is a wasteful number, since it uses less digits than its factorization.

28382825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785 (or 780 counting only the distinct ones).

The product of its digits is 61440, while the sum is 38.

The square root of 28382825 is about 5327.5533784280. The cubic root of 28382825 is about 305.0365449357.

The spelling of 28382825 in words is "twenty-eight million, three hundred eighty-two thousand, eight hundred twenty-five".