27996871 has 8 divisors (see below), whose sum is σ = 32296320. Its totient is φ = 23772408.

The previous prime is 27996851. The next prime is 27996877. The reversal of 27996871 is 17869972.

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 27996871 - 2¹⁵ = 27964103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27996877) 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, 17941 + ... + 19438.

It is an arithmetic number, because the mean of its divisors is an integer number (4037040).

Almost surely, 2^27996871 is an apocalyptic number.

27996871 is a deficient number, since it is larger than the sum of its proper divisors (4299449).

27996871 is a wasteful number, since it uses less digits than its factorization.

27996871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37493.

The product of its digits is 381024, while the sum is 49.

The square root of 27996871 is about 5291.2069511596. The cubic root of 27996871 is about 303.6475854723.

The spelling of 27996871 in words is "twenty-seven million, nine hundred ninety-six thousand, eight hundred seventy-one".