28250225 has 12 divisors (see below), whose sum is σ = 35109360. Its totient is φ = 22549200.

The previous prime is 28250213. The next prime is 28250227. The reversal of 28250225 is 52205282.

It is a happy number.

It is not a de Polignac number, because 28250225 - 2⁶ = 28250161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28250194 and 28250203.

It is not an unprimeable number, because it can be changed into a prime (28250227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13286 + ... + 15264.

It is an arithmetic number, because the mean of its divisors is an integer number (2925780).

Almost surely, 2^28250225 is an apocalyptic number.

28250225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28250225 is a deficient number, since it is larger than the sum of its proper divisors (6859135).

28250225 is a wasteful number, since it uses less digits than its factorization.

28250225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560 (or 2555 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 28250225 is about 5315.0940725447. The cubic root of 28250225 is about 304.5607760101.

The spelling of 28250225 in words is "twenty-eight million, two hundred fifty thousand, two hundred twenty-five".