27628225 has 12 divisors (see below), whose sum is σ = 34841520. Its totient is φ = 21726800.

The previous prime is 27628217. The next prime is 27628259. The reversal of 27628225 is 52282672.

It is a happy number.

It is not a de Polignac number, because 27628225 - 2³ = 27628217 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7891 + ... + 10840.

It is an arithmetic number, because the mean of its divisors is an integer number (2903460).

Almost surely, 2^27628225 is an apocalyptic number.

27628225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27628225 is a deficient number, since it is larger than the sum of its proper divisors (7213295).

27628225 is a wasteful number, since it uses less digits than its factorization.

27628225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18800 (or 18795 counting only the distinct ones).

The product of its digits is 26880, while the sum is 34.

The square root of 27628225 is about 5256.2557966674. The cubic root of 27628225 is about 302.3089429435.

The spelling of 27628225 in words is "twenty-seven million, six hundred twenty-eight thousand, two hundred twenty-five".