28422825 has 24 divisors (see below), whose sum is σ = 49038528. Its totient is φ = 14498880.

The previous prime is 28422811. The next prime is 28422829. The reversal of 28422825 is 52822482.

It is not a de Polignac number, because 28422825 - 2⁹ = 28422313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28422829) 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 23 ways as a sum of consecutive naturals, for example, 6514 + ... + 9963.

It is an arithmetic number, because the mean of its divisors is an integer number (2043272).

Almost surely, 2^28422825 is an apocalyptic number.

28422825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28422825 is a deficient number, since it is larger than the sum of its proper divisors (20615703).

28422825 is a wasteful number, since it uses less digits than its factorization.

28422825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16513 (or 16508 counting only the distinct ones).

The product of its digits is 20480, while the sum is 33.

The square root of 28422825 is about 5331.3061251442. The cubic root of 28422825 is about 305.1797739769.

The spelling of 28422825 in words is "twenty-eight million, four hundred twenty-two thousand, eight hundred twenty-five".