27220860 has 84 divisors (see below), whose sum is σ = 85752408. Its totient is φ = 7255008.

The previous prime is 27220841. The next prime is 27220861. The reversal of 27220860 is 6802272.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27220861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 13647 + ... + 15513.

It is an arithmetic number, because the mean of its divisors is an integer number (1020862).

Almost surely, 2^27220860 is an apocalyptic number.

27220860 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 27220860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42876204).

27220860 is an abundant number, since it is smaller than the sum of its proper divisors (58531548).

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

27220860 is a wasteful number, since it uses less digits than its factorization.

27220860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894 (or 1877 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 27220860 is about 5217.3614020882. The cubic root of 27220860 is about 300.8157796677.

The spelling of 27220860 in words is "twenty-seven million, two hundred twenty thousand, eight hundred sixty".