28227520 has 28 divisors (see below), whose sum is σ = 67217544. Its totient is φ = 11290880.

The previous prime is 28227503. The next prime is 28227523. The reversal of 28227520 is 2572282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28227523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43786 + ... + 44425.

Almost surely, 2^28227520 is an apocalyptic number.

28227520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28227520 is an abundant number, since it is smaller than the sum of its proper divisors (38990024).

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

28227520 is an equidigital number, since it uses as much as digits as its factorization.

28227520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88228 (or 88218 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 28227520 is about 5312.9577449854. The cubic root of 28227520 is about 304.4791612523.

The spelling of 28227520 in words is "twenty-eight million, two hundred twenty-seven thousand, five hundred twenty".