27780855 has 8 divisors (see below), whose sum is σ = 44449392. Its totient is φ = 14816448.

The previous prime is 27780853. The next prime is 27780871. The reversal of 27780855 is 55808772.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27780855 - 2¹ = 27780853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27780853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926014 + ... + 926043.

It is an arithmetic number, because the mean of its divisors is an integer number (5556174).

Almost surely, 2^27780855 is an apocalyptic number.

27780855 is a deficient number, since it is larger than the sum of its proper divisors (16668537).

27780855 is a wasteful number, since it uses less digits than its factorization.

27780855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852065.

The product of its (nonzero) digits is 156800, while the sum is 42.

The square root of 27780855 is about 5270.7546897954. The cubic root of 27780855 is about 302.8646150935.

The spelling of 27780855 in words is "twenty-seven million, seven hundred eighty thousand, eight hundred fifty-five".