27331985 has 4 divisors (see below), whose sum is σ = 32798388. Its totient is φ = 21865584.

The previous prime is 27331943. The next prime is 27331991. The reversal of 27331985 is 58913372.

It is a Cunningham number, because it is equal to 5228²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9834496 + 17497489 = 3136^2 + 4183^2 .

It is a cyclic number.

It is not a de Polignac number, because 27331985 - 2¹⁸ = 27069841 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2733194 + ... + 2733203.

It is an arithmetic number, because the mean of its divisors is an integer number (8199597).

Almost surely, 2^27331985 is an apocalyptic number.

It is an amenable number.

27331985 is a deficient number, since it is larger than the sum of its proper divisors (5466403).

27331985 is an equidigital number, since it uses as much as digits as its factorization.

27331985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5466402.

The product of its digits is 45360, while the sum is 38.

The square root of 27331985 is about 5228.0000956389. Note that the first 4 decimals coincide. The cubic root of 27331985 is about 301.2245687111.

The spelling of 27331985 in words is "twenty-seven million, three hundred thirty-one thousand, nine hundred eighty-five".