27808049 has 4 divisors (see below), whose sum is σ = 27818736. Its totient is φ = 27797364.

The previous prime is 27808007. The next prime is 27808051. The reversal of 27808049 is 94080872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 27808049 - 2¹⁶ = 27742513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27808069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1382 + ... + 7584.

It is an arithmetic number, because the mean of its divisors is an integer number (6954684).

Almost surely, 2^27808049 is an apocalyptic number.

It is an amenable number.

27808049 is a deficient number, since it is larger than the sum of its proper divisors (10687).

27808049 is an equidigital number, since it uses as much as digits as its factorization.

27808049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10686.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 27808049 is about 5273.3337652760. Note that the first 3 decimals coincide. The cubic root of 27808049 is about 302.9634051227.

The spelling of 27808049 in words is "twenty-seven million, eight hundred eight thousand, forty-nine".