27788980 has 24 divisors (see below), whose sum is σ = 59781960. Its totient is φ = 10844160.

The previous prime is 27788953. The next prime is 27789011. The reversal of 27788980 is 8988772.

It can be written as a sum of positive squares in 4 ways, for example, as 2808976 + 24980004 = 1676^2 + 4998^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16125 + ... + 17764.

It is an arithmetic number, because the mean of its divisors is an integer number (2490915).

Almost surely, 2^27788980 is an apocalyptic number.

27788980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27788980 is an abundant number, since it is smaller than the sum of its proper divisors (31992980).

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

27788980 is a wasteful number, since it uses less digits than its factorization.

27788980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33939 (or 33937 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 49.

The square root of 27788980 is about 5271.5253959362. The cubic root of 27788980 is about 302.8941382446.

The spelling of 27788980 in words is "twenty-seven million, seven hundred eighty-eight thousand, nine hundred eighty".