28140822 has 48 divisors (see below), whose sum is σ = 64348128. Its totient is φ = 8870400.

The previous prime is 28140811. The next prime is 28140829. The reversal of 28140822 is 22804182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28140829) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 41478 + ... + 42150.

It is an arithmetic number, because the mean of its divisors is an integer number (1340586).

Almost surely, 2^28140822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28140822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32174064).

28140822 is an abundant number, since it is smaller than the sum of its proper divisors (36207306).

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

28140822 is a wasteful number, since it uses less digits than its factorization.

28140822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805 (or 802 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 28140822 is about 5304.7923616292. The cubic root of 28140822 is about 304.1671158143.

The spelling of 28140822 in words is "twenty-eight million, one hundred forty thousand, eight hundred twenty-two".