27556980 has 96 divisors (see below), whose sum is σ = 86220288. Its totient is φ = 6518400.

The previous prime is 27556909. The next prime is 27556987. The reversal of 27556980 is 8965572.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27556987) 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 31 ways as a sum of consecutive naturals, for example, 27895 + ... + 28865.

It is an arithmetic number, because the mean of its divisors is an integer number (898128).

Almost surely, 2^27556980 is an apocalyptic number.

27556980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27556980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43110144).

27556980 is an abundant number, since it is smaller than the sum of its proper divisors (58663308).

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

27556980 is a wasteful number, since it uses less digits than its factorization.

27556980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037 (or 1035 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 27556980 is about 5249.4742593902. The cubic root of 27556980 is about 302.0488642187.

The spelling of 27556980 in words is "twenty-seven million, five hundred fifty-six thousand, nine hundred eighty".