27261728 has 54 divisors (see below), whose sum is σ = 58947777. Its totient is φ = 12405120.

The previous prime is 27261719. The next prime is 27261733. The reversal of 27261728 is 82716272.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 23309584 + 3952144 = 4828^2 + 1988^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3692.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 383933 + ... + 384003.

Almost surely, 2^27261728 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 27261728

27261728 is an abundant number, since it is smaller than the sum of its proper divisors (31686049).

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

27261728 is an equidigital number, since it uses as much as digits as its factorization.

27261728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 86 counting only the distinct ones).

The product of its digits is 18816, while the sum is 35.

The square root of 27261728 is about 5221.2764722815. The cubic root of 27261728 is about 300.9662475076.

The spelling of 27261728 in words is "twenty-seven million, two hundred sixty-one thousand, seven hundred twenty-eight".