27216420 has 192 divisors, whose sum is σ = 97929216. Its totient is φ = 5483520.

The previous prime is 27216403. The next prime is 27216433. The reversal of 27216420 is 2461272.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 198592 + ... + 198728.

It is an arithmetic number, because the mean of its divisors is an integer number (510048).

Almost surely, 2^27216420 is an apocalyptic number.

27216420 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 27216420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48964608).

27216420 is an abundant number, since it is smaller than the sum of its proper divisors (70712796).

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

27216420 is a wasteful number, since it uses less digits than its factorization.

27216420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 27216420 is about 5216.9358822972. The cubic root of 27216420 is about 300.7994234041.

Adding to 27216420 its reverse (2461272), we get a palindrome (29677692).

The spelling of 27216420 in words is "twenty-seven million, two hundred sixteen thousand, four hundred twenty".