27489147 has 24 divisors (see below), whose sum is σ = 43685712. Its totient is φ = 15321600.

The previous prime is 27489131. The next prime is 27489167. The reversal of 27489147 is 74198472.

It is a happy number.

It is not a de Polignac number, because 27489147 - 2⁴ = 27489131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27489099 and 27489108.

It is not an unprimeable number, because it can be changed into a prime (27489167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3747 + ... + 8307.

It is an arithmetic number, because the mean of its divisors is an integer number (1820238).

Almost surely, 2^27489147 is an apocalyptic number.

27489147 is a deficient number, since it is larger than the sum of its proper divisors (16196565).

27489147 is a wasteful number, since it uses less digits than its factorization.

27489147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4619 (or 4612 counting only the distinct ones).

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

The square root of 27489147 is about 5243.0093457861. The cubic root of 27489147 is about 301.8008240352.

The spelling of 27489147 in words is "twenty-seven million, four hundred eighty-nine thousand, one hundred forty-seven".