28044025 has 12 divisors (see below), whose sum is σ = 34844992. Its totient is φ = 22389840.

The previous prime is 28044017. The next prime is 28044031. The reversal of 28044025 is 52044082.

It is a happy number.

It is not a de Polignac number, because 28044025 - 2³ = 28044017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17404 + ... + 18946.

Almost surely, 2^28044025 is an apocalyptic number.

28044025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28044025 is a deficient number, since it is larger than the sum of its proper divisors (6800967).

28044025 is a wasteful number, since it uses less digits than its factorization.

28044025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280 (or 2275 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 28044025 is about 5295.6609596914. The cubic root of 28044025 is about 303.8179636458.

The spelling of 28044025 in words is "twenty-eight million, forty-four thousand, twenty-five".