27698225 has 6 divisors (see below), whose sum is σ = 34345830. Its totient is φ = 22158560.

The previous prime is 27698207. The next prime is 27698239. The reversal of 27698225 is 52289672.

It can be written as a sum of positive squares in 3 ways, for example, as 9096256 + 18601969 = 3016^2 + 4313^2 .

It is not a de Polignac number, because 27698225 - 2¹⁸ = 27436081 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 5 ways as a sum of consecutive naturals, for example, 553940 + ... + 553989.

It is an arithmetic number, because the mean of its divisors is an integer number (5724305).

Almost surely, 2^27698225 is an apocalyptic number.

27698225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27698225 is a deficient number, since it is larger than the sum of its proper divisors (6647605).

27698225 is a wasteful number, since it uses less digits than its factorization.

27698225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107939 (or 1107934 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 27698225 is about 5262.9103165454. The cubic root of 27698225 is about 302.5640417194.

The spelling of 27698225 in words is "twenty-seven million, six hundred ninety-eight thousand, two hundred twenty-five".