27782139 has 32 divisors (see below), whose sum is σ = 46596096. Its totient is φ = 14303520.

The previous prime is 27782129. The next prime is 27782141. The reversal of 27782139 is 93128772.

It is not a de Polignac number, because 27782139 - 2¹³ = 27773947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27782097 and 27782106.

It is not an unprimeable number, because it can be changed into a prime (27782119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28864 + ... + 29810.

It is an arithmetic number, because the mean of its divisors is an integer number (1456128).

Almost surely, 2^27782139 is an apocalyptic number.

27782139 is a deficient number, since it is larger than the sum of its proper divisors (18813957).

27782139 is a wasteful number, since it uses less digits than its factorization.

27782139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095.

The product of its digits is 42336, while the sum is 39.

The square root of 27782139 is about 5270.8764925769. The cubic root of 27782139 is about 302.8692810427.

The spelling of 27782139 in words is "twenty-seven million, seven hundred eighty-two thousand, one hundred thirty-nine".