28813356 has 144 divisors (see below), whose sum is σ = 88976160. Its totient is φ = 7741440.

The previous prime is 28813339. The next prime is 28813361. The reversal of 28813356 is 65331882.

28813356 = 474² + 475² + ... + 577².

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

Its product of digits (34560) is a multiple of the sum of its prime factors (256).

It is a self number, because there is not a number n which added to its sum of digits gives 28813356.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 149196 + ... + 149388.

It is an arithmetic number, because the mean of its divisors is an integer number (617890).

Almost surely, 2^28813356 is an apocalyptic number.

28813356 is a gapful number since it is divisible by the number (26) 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 28813356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44488080).

28813356 is an abundant number, since it is smaller than the sum of its proper divisors (60162804).

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

28813356 is a wasteful number, since it uses less digits than its factorization.

28813356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 251 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 28813356 is about 5367.8073735931. The cubic root of 28813356 is about 306.5711491012.

The spelling of 28813356 in words is "twenty-eight million, eight hundred thirteen thousand, three hundred fifty-six".