28088280 has 192 divisors, whose sum is σ = 102604320. Its totient is φ = 6604800.

The previous prime is 28088237. The next prime is 28088293. The reversal of 28088280 is 8288082.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 162274 + ... + 162446.

Almost surely, 2^28088280 is an apocalyptic number.

28088280 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 28088280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51302160).

28088280 is an abundant number, since it is smaller than the sum of its proper divisors (74516040).

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

28088280 is a wasteful number, since it uses less digits than its factorization.

28088280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 36.

The square root of 28088280 is about 5299.8377333651. The cubic root of 28088280 is about 303.9776934233.

The spelling of 28088280 in words is "twenty-eight million, eighty-eight thousand, two hundred eighty".