27989225 has 24 divisors (see below), whose sum is σ = 40095648. Its totient is φ = 19155200.

The previous prime is 27989207. The next prime is 27989231. The reversal of 27989225 is 52298972.

It is not a de Polignac number, because 27989225 - 2⁶ = 27989161 is a prime.

It is a super-2 number, since 2×27989225² = 1566793432201250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1682 + ... + 7668.

It is an arithmetic number, because the mean of its divisors is an integer number (1670652).

Almost surely, 2^27989225 is an apocalyptic number.

27989225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27989225 is a deficient number, since it is larger than the sum of its proper divisors (12106423).

27989225 is a wasteful number, since it uses less digits than its factorization.

27989225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6025 (or 6020 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 27989225 is about 5290.4843823605. The cubic root of 27989225 is about 303.6199407065.

The spelling of 27989225 in words is "twenty-seven million, nine hundred eighty-nine thousand, two hundred twenty-five".