27728288 has 24 divisors (see below), whose sum is σ = 62389152. Its totient is φ = 11883456.

The previous prime is 27728287. The next prime is 27728303. The reversal of 27728288 is 88282772.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (27728287) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 61670 + ... + 62117.

It is an arithmetic number, because the mean of its divisors is an integer number (2599548).

Almost surely, 2^27728288 is an apocalyptic number.

27728288 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27728288 is an abundant number, since it is smaller than the sum of its proper divisors (34660864).

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

27728288 is a wasteful number, since it uses less digits than its factorization.

27728288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123804 (or 123796 counting only the distinct ones).

The product of its digits is 200704, while the sum is 44.

The square root of 27728288 is about 5265.7656613260. The cubic root of 27728288 is about 302.6734674307.

The spelling of 27728288 in words is "twenty-seven million, seven hundred twenty-eight thousand, two hundred eighty-eight".