27155220 has 24 divisors (see below), whose sum is σ = 76034784. Its totient is φ = 7241376.

The previous prime is 27155201. The next prime is 27155221. The reversal of 27155220 is 2255172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27155221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226234 + ... + 226353.

It is an arithmetic number, because the mean of its divisors is an integer number (3168116).

Almost surely, 2^27155220 is an apocalyptic number.

27155220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27155220 is an abundant number, since it is smaller than the sum of its proper divisors (48879564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27155220 is a wasteful number, since it uses less digits than its factorization.

27155220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452599 (or 452597 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 27155220 is about 5211.0670692287. The cubic root of 27155220 is about 300.5737907365.

The spelling of 27155220 in words is "twenty-seven million, one hundred fifty-five thousand, two hundred twenty".