27839421 has 12 divisors (see below), whose sum is σ = 42578172. Its totient is φ = 17467776.

The previous prime is 27839419. The next prime is 27839443. The reversal of 27839421 is 12493872.

It can be written as a sum of positive squares in 2 ways, for example, as 14333796 + 13505625 = 3786^2 + 3675^2 .

It is not a de Polignac number, because 27839421 - 2¹ = 27839419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27839491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90826 + ... + 91131.

It is an arithmetic number, because the mean of its divisors is an integer number (3548181).

Almost surely, 2^27839421 is an apocalyptic number.

It is an amenable number.

27839421 is a deficient number, since it is larger than the sum of its proper divisors (14738751).

27839421 is a wasteful number, since it uses less digits than its factorization.

27839421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181980 (or 181977 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 27839421 is about 5276.3075156780. The cubic root of 27839421 is about 303.0772929632.

The spelling of 27839421 in words is "twenty-seven million, eight hundred thirty-nine thousand, four hundred twenty-one".