27789139 has 8 divisors (see below), whose sum is σ = 31834880. Its totient is φ = 23762376.

The previous prime is 27789133. The next prime is 27789143. The reversal of 27789139 is 93198772.

It is a happy number.

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 27789139 - 2⁵ = 27789107 is a prime.

It is a super-2 number, since 2×27789139² = 1544472492722642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27789133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1449 + ... + 7594.

It is an arithmetic number, because the mean of its divisors is an integer number (3979360).

Almost surely, 2^27789139 is an apocalyptic number.

27789139 is a deficient number, since it is larger than the sum of its proper divisors (4045741).

27789139 is an equidigital number, since it uses as much as digits as its factorization.

27789139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9489.

The product of its digits is 190512, while the sum is 46.

The square root of 27789139 is about 5271.5404769384. The cubic root of 27789139 is about 302.8947159325.

The spelling of 27789139 in words is "twenty-seven million, seven hundred eighty-nine thousand, one hundred thirty-nine".