28995225 has 24 divisors (see below), whose sum is σ = 54788160. Its totient is φ = 13254720.

The previous prime is 28995223. The next prime is 28995259. The reversal of 28995225 is 52259982.

It is not a de Polignac number, because 28995225 - 2¹ = 28995223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28995223) 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, 27090 + ... + 28139.

It is an arithmetic number, because the mean of its divisors is an integer number (2282840).

Almost surely, 2^28995225 is an apocalyptic number.

28995225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28995225 is a deficient number, since it is larger than the sum of its proper divisors (25792935).

28995225 is a wasteful number, since it uses less digits than its factorization.

28995225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55249 (or 55244 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

The square root of 28995225 is about 5384.7214412632. The cubic root of 28995225 is about 307.2148192144.

The spelling of 28995225 in words is "twenty-eight million, nine hundred ninety-five thousand, two hundred twenty-five".