27992439 has 8 divisors (see below), whose sum is σ = 41470320. Its totient is φ = 18661608.

The previous prime is 27992431. The next prime is 27992443. The reversal of 27992439 is 93429972.

It is not a de Polignac number, because 27992439 - 2³ = 27992431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27992394 and 27992403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27992431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518352 + ... + 518405.

It is an arithmetic number, because the mean of its divisors is an integer number (5183790).

Almost surely, 2^27992439 is an apocalyptic number.

27992439 is a deficient number, since it is larger than the sum of its proper divisors (13477881).

27992439 is a wasteful number, since it uses less digits than its factorization.

27992439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036766 (or 1036760 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 27992439 is about 5290.7881265460. The cubic root of 27992439 is about 303.6315618112.

The spelling of 27992439 in words is "twenty-seven million, nine hundred ninety-two thousand, four hundred thirty-nine".