27728260 has 48 divisors (see below), whose sum is σ = 68705280. Its totient is φ = 9198720.

The previous prime is 27728231. The next prime is 27728287. The reversal of 27728260 is 6282772.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1146 + ... + 7534.

It is an arithmetic number, because the mean of its divisors is an integer number (1431360).

Almost surely, 2^27728260 is an apocalyptic number.

27728260 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 27728260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34352640).

27728260 is an abundant number, since it is smaller than the sum of its proper divisors (40977020).

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

27728260 is a wasteful number, since it uses less digits than its factorization.

27728260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6436 (or 6434 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 27728260 is about 5265.7630026426. The cubic root of 27728260 is about 302.6733655509.

The spelling of 27728260 in words is "twenty-seven million, seven hundred twenty-eight thousand, two hundred sixty".