27992479 has 4 divisors (see below), whose sum is σ = 28164376. Its totient is φ = 27820584.

The previous prime is 27992477. The next prime is 27992501. The reversal of 27992479 is 97429972.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27992479 - 2¹ = 27992477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27992477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85704 + ... + 86029.

It is an arithmetic number, because the mean of its divisors is an integer number (7041094).

Almost surely, 2^27992479 is an apocalyptic number.

27992479 is a deficient number, since it is larger than the sum of its proper divisors (171897).

27992479 is a wasteful number, since it uses less digits than its factorization.

27992479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171896.

The product of its digits is 571536, while the sum is 49.

The square root of 27992479 is about 5290.7919066998. The cubic root of 27992479 is about 303.6317064366.

The spelling of 27992479 in words is "twenty-seven million, nine hundred ninety-two thousand, four hundred seventy-nine".