27880191 has 12 divisors (see below), whose sum is σ = 41570880. Its totient is φ = 17987040.

The previous prime is 27880189. The next prime is 27880207. The reversal of 27880191 is 19108872.

It is not a de Polignac number, because 27880191 - 2¹ = 27880189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27880121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49686 + ... + 50243.

It is an arithmetic number, because the mean of its divisors is an integer number (3464240).

Almost surely, 2^27880191 is an apocalyptic number.

27880191 is a deficient number, since it is larger than the sum of its proper divisors (13690689).

27880191 is a wasteful number, since it uses less digits than its factorization.

27880191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99966 (or 99963 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 27880191 is about 5280.1695995489. The cubic root of 27880191 is about 303.2251700120.

The spelling of 27880191 in words is "twenty-seven million, eight hundred eighty thousand, one hundred ninety-one".