27915139 has 16 divisors (see below), whose sum is σ = 34948800. Its totient is φ = 21740544.

The previous prime is 27915119. The next prime is 27915143. The reversal of 27915139 is 93151972.

It is not a de Polignac number, because 27915139 - 2⁷ = 27915011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27915098 and 27915107.

It is not an unprimeable number, because it can be changed into a prime (27915119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 594 + ... + 7495.

It is an arithmetic number, because the mean of its divisors is an integer number (2184300).

Almost surely, 2^27915139 is an apocalyptic number.

27915139 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

27915139 is a deficient number, since it is larger than the sum of its proper divisors (7033661).

27915139 is a wasteful number, since it uses less digits than its factorization.

27915139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8142.

The product of its digits is 17010, while the sum is 37.

The square root of 27915139 is about 5283.4779265177. The cubic root of 27915139 is about 303.3518153480.

The spelling of 27915139 in words is "twenty-seven million, nine hundred fifteen thousand, one hundred thirty-nine".