28208088 has 80 divisors (see below), whose sum is σ = 79976160. Its totient is φ = 9288000.

The previous prime is 28208071. The next prime is 28208093. The reversal of 28208088 is 88080282.

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 19 ways as a sum of consecutive naturals, for example, 65233 + ... + 65663.

It is an arithmetic number, because the mean of its divisors is an integer number (999702).

Almost surely, 2^28208088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28208088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39988080).

28208088 is an abundant number, since it is smaller than the sum of its proper divisors (51768072).

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

28208088 is a wasteful number, since it uses less digits than its factorization.

28208088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 537 counting only the distinct ones).

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

The square root of 28208088 is about 5311.1286936018. The cubic root of 28208088 is about 304.4092767653.

The spelling of 28208088 in words is "twenty-eight million, two hundred eight thousand, eighty-eight".