28268280 has 192 divisors, whose sum is σ = 101088000. Its totient is φ = 6819840.

The previous prime is 28268267. The next prime is 28268287. The reversal of 28268280 is 8286282.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28268287) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 189646 + ... + 189794.

It is an arithmetic number, because the mean of its divisors is an integer number (526500).

Almost surely, 2^28268280 is an apocalyptic number.

28268280 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 28268280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50544000).

28268280 is an abundant number, since it is smaller than the sum of its proper divisors (72819720).

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

28268280 is a wasteful number, since it uses less digits than its factorization.

28268280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 28268280 is about 5316.7922660191. The cubic root of 28268280 is about 304.6256448005.

The spelling of 28268280 in words is "twenty-eight million, two hundred sixty-eight thousand, two hundred eighty".