27906225 has 24 divisors (see below), whose sum is σ = 46342272. Its totient is φ = 14817600.

The previous prime is 27906223. The next prime is 27906239. The reversal of 27906225 is 52260972.

It is a happy number.

It is not a de Polignac number, because 27906225 - 2¹ = 27906223 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27906223) 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, 19639 + ... + 21011.

It is an arithmetic number, because the mean of its divisors is an integer number (1930928).

Almost surely, 2^27906225 is an apocalyptic number.

27906225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27906225 is a deficient number, since it is larger than the sum of its proper divisors (18436047).

27906225 is a wasteful number, since it uses less digits than its factorization.

27906225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657 (or 1652 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 27906225 is about 5282.6342860357. The cubic root of 27906225 is about 303.3195226440.

The spelling of 27906225 in words is "twenty-seven million, nine hundred six thousand, two hundred twenty-five".