27218420 has 12 divisors (see below), whose sum is σ = 57158724. Its totient is φ = 10887360.

The previous prime is 27218419. The next prime is 27218447. The reversal of 27218420 is 2481272.

It can be written as a sum of positive squares in 2 ways, for example, as 18421264 + 8797156 = 4292^2 + 2966^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 27218420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680441 + ... + 680480.

It is an arithmetic number, because the mean of its divisors is an integer number (4763227).

Almost surely, 2^27218420 is an apocalyptic number.

27218420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27218420 is an abundant number, since it is smaller than the sum of its proper divisors (29940304).

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

27218420 is a wasteful number, since it uses less digits than its factorization.

27218420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360930 (or 1360928 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 27218420 is about 5217.1275621744. The cubic root of 27218420 is about 300.8067913106.

Adding to 27218420 its reverse (2481272), we get a palindrome (29699692).

The spelling of 27218420 in words is "twenty-seven million, two hundred eighteen thousand, four hundred twenty".