28068225 has 24 divisors (see below), whose sum is σ = 48851040. Its totient is φ = 14181120.

The previous prime is 28068199. The next prime is 28068253. The reversal of 28068225 is 52286082.

It is not a de Polignac number, because 28068225 - 2⁷ = 28068097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8424 + ... + 11273.

It is an arithmetic number, because the mean of its divisors is an integer number (2035460).

Almost surely, 2^28068225 is an apocalyptic number.

28068225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28068225 is a deficient number, since it is larger than the sum of its proper divisors (20782815).

28068225 is a wasteful number, since it uses less digits than its factorization.

28068225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19729 (or 19724 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 28068225 is about 5297.9453564566. The cubic root of 28068225 is about 303.9053296221.

The spelling of 28068225 in words is "twenty-eight million, sixty-eight thousand, two hundred twenty-five".