27209728 has 104 divisors (see below), whose sum is σ = 67887008. Its totient is φ = 10616832.

The previous prime is 27209711. The next prime is 27209731. The reversal of 27209728 is 82790272.

It is a tau number, because it is divible by the number of its divisors (104).

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372700 + ... + 372772.

Almost surely, 2^27209728 is an apocalyptic number.

27209728 is a gapful number since it is divisible by the number (28) 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 27209728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33943504).

27209728 is an abundant number, since it is smaller than the sum of its proper divisors (40677280).

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

27209728 is an equidigital number, since it uses as much as digits as its factorization.

27209728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 27209728 is about 5216.2944702154. The cubic root of 27209728 is about 300.7747677643.

The spelling of 27209728 in words is "twenty-seven million, two hundred nine thousand, seven hundred twenty-eight".