27984147 has 4 divisors (see below), whose sum is σ = 37312200. Its totient is φ = 18656096.

The previous prime is 27984127. The next prime is 27984157. The reversal of 27984147 is 74148972.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27984147 is a prime.

It is a super-2 number, since 2×27984147² = 1566224966635218, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27984099 and 27984108.

It is not an unprimeable number, because it can be changed into a prime (27984127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4664022 + ... + 4664027.

It is an arithmetic number, because the mean of its divisors is an integer number (9328050).

Almost surely, 2^27984147 is an apocalyptic number.

27984147 is a deficient number, since it is larger than the sum of its proper divisors (9328053).

27984147 is an equidigital number, since it uses as much as digits as its factorization.

27984147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9328052.

The product of its digits is 112896, while the sum is 42.

The square root of 27984147 is about 5290.0044423422. The cubic root of 27984147 is about 303.6015779817.

The spelling of 27984147 in words is "twenty-seven million, nine hundred eighty-four thousand, one hundred forty-seven".