27966387 has 16 divisors (see below), whose sum is σ = 38384640. Its totient is φ = 18100800.

The previous prime is 27966349. The next prime is 27966397. The reversal of 27966387 is 78366972.

It is not a de Polignac number, because 27966387 - 2⁷ = 27966259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27966307) 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, 32914 + ... + 33752.

It is an arithmetic number, because the mean of its divisors is an integer number (2399040).

Almost surely, 2^27966387 is an apocalyptic number.

27966387 is a deficient number, since it is larger than the sum of its proper divisors (10418253).

27966387 is a wasteful number, since it uses less digits than its factorization.

27966387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154.

The product of its digits is 762048, while the sum is 48.

The square root of 27966387 is about 5288.3255383911. The cubic root of 27966387 is about 303.5373379784.

It can be divided in two parts, 279 and 66387, that added together give a palindrome (66666).

The spelling of 27966387 in words is "twenty-seven million, nine hundred sixty-six thousand, three hundred eighty-seven".