27778055 has 4 divisors (see below), whose sum is σ = 33333672. Its totient is φ = 22222440.

The previous prime is 27778039. The next prime is 27778061. The reversal of 27778055 is 55087772.

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

It is not a de Polignac number, because 27778055 - 2⁴ = 27778039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2777801 + ... + 2777810.

It is an arithmetic number, because the mean of its divisors is an integer number (8333418).

Almost surely, 2^27778055 is an apocalyptic number.

27778055 is a deficient number, since it is larger than the sum of its proper divisors (5555617).

27778055 is an equidigital number, since it uses as much as digits as its factorization.

27778055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555616.

The product of its (nonzero) digits is 137200, while the sum is 41.

The square root of 27778055 is about 5270.4890664909. The cubic root of 27778055 is about 302.8544396278.

The spelling of 27778055 in words is "twenty-seven million, seven hundred seventy-eight thousand, fifty-five".