28227980 has 48 divisors (see below), whose sum is σ = 66769920. Its totient is φ = 9931200.

The previous prime is 28227961. The next prime is 28227989. The reversal of 28227980 is 8972282.

It is not an unprimeable number, because it can be changed into a prime (28227989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4751 + ... + 8889.

It is an arithmetic number, because the mean of its divisors is an integer number (1391040).

Almost surely, 2^28227980 is an apocalyptic number.

28227980 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 28227980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33384960).

28227980 is an abundant number, since it is smaller than the sum of its proper divisors (38541940).

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

28227980 is a wasteful number, since it uses less digits than its factorization.

28227980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4190 (or 4188 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 28227980 is about 5313.0010351966. The cubic root of 28227980 is about 304.4808151897.

The spelling of 28227980 in words is "twenty-eight million, two hundred twenty-seven thousand, nine hundred eighty".