27021228 has 96 divisors (see below), whose sum is σ = 75188736. Its totient is φ = 7468032.

The previous prime is 27021223. The next prime is 27021229. The reversal of 27021228 is 82212072.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 27021198 and 27021207.

It is not an unprimeable number, because it can be changed into a prime (27021221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60775 + ... + 61217.

It is an arithmetic number, because the mean of its divisors is an integer number (783216).

Almost surely, 2^27021228 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 27021228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37594368).

27021228 is an abundant number, since it is smaller than the sum of its proper divisors (48167508).

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

27021228 is a wasteful number, since it uses less digits than its factorization.

27021228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 27021228 is about 5198.1946866196. The cubic root of 27021228 is about 300.0786016264.

The spelling of 27021228 in words is "twenty-seven million, twenty-one thousand, two hundred twenty-eight".