27980660 has 12 divisors (see below), whose sum is σ = 58759428. Its totient is φ = 11192256.

The previous prime is 27980653. The next prime is 27980669. The reversal of 27980660 is 6608972.

It can be written as a sum of positive squares in 2 ways, for example, as 19254544 + 8726116 = 4388^2 + 2954^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27980669) 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, 699497 + ... + 699536.

It is an arithmetic number, because the mean of its divisors is an integer number (4896619).

Almost surely, 2^27980660 is an apocalyptic number.

27980660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27980660 is an abundant number, since it is smaller than the sum of its proper divisors (30778768).

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

27980660 is a wasteful number, since it uses less digits than its factorization.

27980660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399042 (or 1399040 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 27980660 is about 5289.6748482303. The cubic root of 27980660 is about 303.5889672385.

The spelling of 27980660 in words is "twenty-seven million, nine hundred eighty thousand, six hundred sixty".