28174225 has 12 divisors (see below), whose sum is σ = 36141660. Its totient is φ = 21761600.

The previous prime is 28174199. The next prime is 28174231. The reversal of 28174225 is 52247182.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 200704 + 27973521 = 448^2 + 5289^2 .

It is not a de Polignac number, because 28174225 - 2⁵ = 28174193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18706 + ... + 20155.

It is an arithmetic number, because the mean of its divisors is an integer number (3011805).

Almost surely, 2^28174225 is an apocalyptic number.

28174225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28174225 is a deficient number, since it is larger than the sum of its proper divisors (7967435).

28174225 is a wasteful number, since it uses less digits than its factorization.

28174225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38900 (or 38895 counting only the distinct ones).

The product of its digits is 8960, while the sum is 31.

The square root of 28174225 is about 5307.9398074959. The cubic root of 28174225 is about 304.2874164559.

The spelling of 28174225 in words is "twenty-eight million, one hundred seventy-four thousand, two hundred twenty-five".