27380220 has 144 divisors (see below), whose sum is σ = 91163520. Its totient is φ = 6120576.

The previous prime is 27380219. The next prime is 27380231. The reversal of 27380220 is 2208372.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 196911 + ... + 197049.

It is an arithmetic number, because the mean of its divisors is an integer number (633080).

Almost surely, 2^27380220 is an apocalyptic number.

27380220 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 27380220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45581760).

27380220 is an abundant number, since it is smaller than the sum of its proper divisors (63783300).

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

27380220 is a wasteful number, since it uses less digits than its factorization.

27380220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 223 counting only the distinct ones).

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

The square root of 27380220 is about 5232.6112028317. The cubic root of 27380220 is about 301.4016631576.

Adding to 27380220 its reverse (2208372), we get a palindrome (29588592).

The spelling of 27380220 in words is "twenty-seven million, three hundred eighty thousand, two hundred twenty".