27171072 has 72 divisors (see below), whose sum is σ = 80370080. Its totient is φ = 9054720.

The previous prime is 27171071. The next prime is 27171127. The reversal of 27171072 is 27017172.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (27171071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4947 + ... + 8877.

Almost surely, 2^27171072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27171072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40185040).

27171072 is an abundant number, since it is smaller than the sum of its proper divisors (53199008).

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

27171072 is an equidigital number, since it uses as much as digits as its factorization.

27171072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956 (or 3936 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 27.

The square root of 27171072 is about 5212.5878409865. The cubic root of 27171072 is about 300.6322665273.

The spelling of 27171072 in words is "twenty-seven million, one hundred seventy-one thousand, seventy-two".