27009920 has 64 divisors (see below), whose sum is σ = 73807200. Its totient is φ = 9259008.

The previous prime is 27009919. The next prime is 27009937. The reversal of 27009920 is 2990072.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

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, 1466 + ... + 7494.

Almost surely, 2^27009920 is an apocalyptic number.

27009920 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 27009920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36903600).

27009920 is an abundant number, since it is smaller than the sum of its proper divisors (46797280).

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

27009920 is an equidigital number, since it uses as much as digits as its factorization.

27009920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6055 (or 6043 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 27009920 is about 5197.1068874904. The cubic root of 27009920 is about 300.0367362421.

Adding to 27009920 its reverse (2990072), we get a palindrome (29999992).

The spelling of 27009920 in words is "twenty-seven million, nine thousand, nine hundred twenty".