27939481 has 8 divisors (see below), whose sum is σ = 29466720. Its totient is φ = 26417952.

The previous prime is 27939473. The next prime is 27939487. The reversal of 27939481 is 18493972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27939481 - 2³ = 27939473 is a prime.

It is a super-2 number, since 2×27939481² = 1561229197098722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27939487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11901 + ... + 14053.

It is an arithmetic number, because the mean of its divisors is an integer number (3683340).

Almost surely, 2^27939481 is an apocalyptic number.

It is an amenable number.

27939481 is a deficient number, since it is larger than the sum of its proper divisors (1527239).

27939481 is a wasteful number, since it uses less digits than its factorization.

27939481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855.

The product of its digits is 108864, while the sum is 43.

The square root of 27939481 is about 5285.7810208142. The cubic root of 27939481 is about 303.4399639877.

The spelling of 27939481 in words is "twenty-seven million, nine hundred thirty-nine thousand, four hundred eighty-one".