27109980 has 36 divisors (see below), whose sum is σ = 82234152. Its totient is φ = 7229280.

The previous prime is 27109961. The next prime is 27109981. The reversal of 27109980 is 8990172.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27109981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75126 + ... + 75485.

It is an arithmetic number, because the mean of its divisors is an integer number (2284282).

Almost surely, 2^27109980 is an apocalyptic number.

27109980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27109980 is an abundant number, since it is smaller than the sum of its proper divisors (55124172).

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

27109980 is a wasteful number, since it uses less digits than its factorization.

27109980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150626 (or 150621 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 27109980 is about 5206.7244981850. The cubic root of 27109980 is about 300.4067815134.

The spelling of 27109980 in words is "twenty-seven million, one hundred nine thousand, nine hundred eighty".