27979841 has 4 divisors (see below), whose sum is σ = 29625732. Its totient is φ = 26333952.

The previous prime is 27979829. The next prime is 27979871. The reversal of 27979841 is 14897972.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24216241 + 3763600 = 4921^2 + 1940^2 .

It is a de Polignac number, because none of the positive numbers 2^k-27979841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27979871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 822920 + ... + 822953.

It is an arithmetic number, because the mean of its divisors is an integer number (7406433).

Almost surely, 2^27979841 is an apocalyptic number.

It is an amenable number.

27979841 is a deficient number, since it is larger than the sum of its proper divisors (1645891).

27979841 is a wasteful number, since it uses less digits than its factorization.

27979841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645890.

The product of its digits is 254016, while the sum is 47.

The square root of 27979841 is about 5289.5974326975. The cubic root of 27979841 is about 303.5860051712.

The spelling of 27979841 in words is "twenty-seven million, nine hundred seventy-nine thousand, eight hundred forty-one".