27271764 has 72 divisors (see below), whose sum is σ = 78172640. Its totient is φ = 7947072.

The previous prime is 27271763. The next prime is 27271781. The reversal of 27271764 is 46717272.

It is a happy number.

It is a super-2 number, since 2×27271764² = 1487498223343392, which contains 22 as substring.

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 (27271763) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7359 + ... + 10425.

Almost surely, 2^27271764 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 27271764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39086320).

27271764 is an abundant number, since it is smaller than the sum of its proper divisors (50900876).

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

27271764 is a wasteful number, since it uses less digits than its factorization.

27271764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109 (or 3104 counting only the distinct ones).

The product of its digits is 32928, while the sum is 36.

The square root of 27271764 is about 5222.2374515144. The cubic root of 27271764 is about 301.0031750602.

The spelling of 27271764 in words is "twenty-seven million, two hundred seventy-one thousand, seven hundred sixty-four".