27489920 has 32 divisors (see below), whose sum is σ = 65719620. Its totient is φ = 10995712.

The previous prime is 27489919. The next prime is 27489937. The reversal of 27489920 is 2998472.

It can be written as a sum of positive squares in 2 ways, for example, as 24364096 + 3125824 = 4936^2 + 1768^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20837 + ... + 22116.

Almost surely, 2^27489920 is an apocalyptic number.

27489920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27489920 is an abundant number, since it is smaller than the sum of its proper divisors (38229700).

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

27489920 is an equidigital number, since it uses as much as digits as its factorization.

27489920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42972 (or 42960 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 27489920 is about 5243.0830624738. The cubic root of 27489920 is about 301.8036529074.

The spelling of 27489920 in words is "twenty-seven million, four hundred eighty-nine thousand, nine hundred twenty".