28844025 has 24 divisors (see below), whose sum is σ = 54502464. Its totient is φ = 13185600.

The previous prime is 28844021. The next prime is 28844027. The reversal of 28844025 is 52044882.

It is a happy number.

It is not a de Polignac number, because 28844025 - 2² = 28844021 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28844021) 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, 26946 + ... + 27995.

It is an arithmetic number, because the mean of its divisors is an integer number (2270936).

Almost surely, 2^28844025 is an apocalyptic number.

28844025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28844025 is a deficient number, since it is larger than the sum of its proper divisors (25658439).

28844025 is a wasteful number, since it uses less digits than its factorization.

28844025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54961 (or 54956 counting only the distinct ones).

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

The square root of 28844025 is about 5370.6633668477. The cubic root of 28844025 is about 306.6798822020.

The spelling of 28844025 in words is "twenty-eight million, eight hundred forty-four thousand, twenty-five".