27968791 has 8 divisors (see below), whose sum is σ = 30303504. Its totient is φ = 25710720.

The previous prime is 27968767. The next prime is 27968803. The reversal of 27968791 is 19786972.

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 27968791 - 2¹³ = 27960599 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 (27968701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18400 + ... + 19861.

It is an arithmetic number, because the mean of its divisors is an integer number (3787938).

Almost surely, 2^27968791 is an apocalyptic number.

27968791 is a deficient number, since it is larger than the sum of its proper divisors (2334713).

27968791 is a wasteful number, since it uses less digits than its factorization.

27968791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38321.

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

The square root of 27968791 is about 5288.5528266247. The cubic root of 27968791 is about 303.5460351196.

The spelling of 27968791 in words is "twenty-seven million, nine hundred sixty-eight thousand, seven hundred ninety-one".