27051728 has 60 divisors (see below), whose sum is σ = 58629060. Its totient is φ = 12080640.

The previous prime is 27051721. The next prime is 27051737. The reversal of 27051728 is 82715072.

It can be written as a sum of positive squares in 2 ways, for example, as 6512704 + 20539024 = 2552^2 + 4532^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27051694 and 27051703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27051721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172226 + ... + 172382.

It is an arithmetic number, because the mean of its divisors is an integer number (977151).

Almost surely, 2^27051728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27051728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29314530).

27051728 is an abundant number, since it is smaller than the sum of its proper divisors (31577332).

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

27051728 is a wasteful number, since it uses less digits than its factorization.

27051728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 27051728 is about 5201.1275700563. The cubic root of 27051728 is about 300.1914629656.

The spelling of 27051728 in words is "twenty-seven million, fifty-one thousand, seven hundred twenty-eight".