27965421 has 24 divisors (see below), whose sum is σ = 44362656. Its totient is φ = 16835040.

The previous prime is 27965419. The next prime is 27965429. The reversal of 27965421 is 12456972.

27965421 is a `hidden beast` number, since 27 + 96 + 542 + 1 = 666.

It is not a de Polignac number, because 27965421 - 2¹ = 27965419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27965429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15271 + ... + 17003.

It is an arithmetic number, because the mean of its divisors is an integer number (1848444).

Almost surely, 2^27965421 is an apocalyptic number.

It is an amenable number.

27965421 is a deficient number, since it is larger than the sum of its proper divisors (16397235).

27965421 is a wasteful number, since it uses less digits than its factorization.

27965421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913 (or 1910 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 27965421 is about 5288.2342043446. The cubic root of 27965421 is about 303.5338430633.

The spelling of 27965421 in words is "twenty-seven million, nine hundred sixty-five thousand, four hundred twenty-one".