28922208 has 96 divisors (see below), whose sum is σ = 87607296. Its totient is φ = 8183808.

The previous prime is 28922203. The next prime is 28922209. The reversal of 28922208 is 80222982.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28922203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129585 + ... + 129807.

It is an arithmetic number, because the mean of its divisors is an integer number (912576).

Almost surely, 2^28922208 is an apocalyptic number.

28922208 is a gapful number since it is divisible by the number (28) 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 28922208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43803648).

28922208 is an abundant number, since it is smaller than the sum of its proper divisors (58685088).

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

28922208 is a wasteful number, since it uses less digits than its factorization.

28922208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 28922208 is about 5377.9371509901. The cubic root of 28922208 is about 306.9567219990.

The spelling of 28922208 in words is "twenty-eight million, nine hundred twenty-two thousand, two hundred eight".