27820120 has 16 divisors (see below), whose sum is σ = 62595360. Its totient is φ = 11128032.

The previous prime is 27820103. The next prime is 27820127. The reversal of 27820120 is 2102872.

It is a junction number, because it is equal to n+sod(n) for n = 27820091 and 27820100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27820127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347712 + ... + 347791.

It is an arithmetic number, because the mean of its divisors is an integer number (3912210).

Almost surely, 2^27820120 is an apocalyptic number.

27820120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27820120 is an abundant number, since it is smaller than the sum of its proper divisors (34775240).

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

27820120 is a wasteful number, since it uses less digits than its factorization.

27820120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695514 (or 695510 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 27820120 is about 5274.4781732414. The cubic root of 27820120 is about 303.0072358643.

Adding to 27820120 its reverse (2102872), we get a palindrome (29922992).

The spelling of 27820120 in words is "twenty-seven million, eight hundred twenty thousand, one hundred twenty".