28227760 has 40 divisors (see below), whose sum is σ = 71598096. Its totient is φ = 10264320.

The previous prime is 28227743. The next prime is 28227761. The reversal of 28227760 is 6772282.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28227761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15159 + ... + 16918.

Almost surely, 2^28227760 is an apocalyptic number.

28227760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28227760 is an abundant number, since it is smaller than the sum of its proper divisors (43370336).

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

28227760 is a wasteful number, since it uses less digits than its factorization.

28227760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32101 (or 32095 counting only the distinct ones).

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

The square root of 28227760 is about 5312.9803312265. The cubic root of 28227760 is about 304.4800241784.

The spelling of 28227760 in words is "twenty-eight million, two hundred twenty-seven thousand, seven hundred sixty".