27161620 has 48 divisors (see below), whose sum is σ = 60092928. Its totient is φ = 10292480.

The previous prime is 27161593. The next prime is 27161669. The reversal of 27161620 is 2616172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62805 + ... + 63235.

It is an arithmetic number, because the mean of its divisors is an integer number (1251936).

Almost surely, 2^27161620 is an apocalyptic number.

27161620 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 27161620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30046464).

27161620 is an abundant number, since it is smaller than the sum of its proper divisors (32931308).

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

27161620 is a wasteful number, since it uses less digits than its factorization.

27161620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 27161620 is about 5211.6811107358. The cubic root of 27161620 is about 300.5974021718.

Adding to 27161620 its reverse (2616172), we get a palindrome (29777792).

The spelling of 27161620 in words is "twenty-seven million, one hundred sixty-one thousand, six hundred twenty".