28022910 has 64 divisors (see below), whose sum is σ = 71435520. Its totient is φ = 7015680.

The previous prime is 28022893. The next prime is 28022921. The reversal of 28022910 is 1922082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120154 + ... + 120386.

It is an arithmetic number, because the mean of its divisors is an integer number (1116180).

Almost surely, 2^28022910 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28022910, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35717760).

28022910 is an abundant number, since it is smaller than the sum of its proper divisors (43412610).

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

28022910 is a wasteful number, since it uses less digits than its factorization.

28022910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 28022910 is about 5293.6669710136. Note that the first 3 decimals coincide. The cubic root of 28022910 is about 303.7416939591.

Adding to 28022910 its reverse (1922082), we get a palindrome (29944992).

The spelling of 28022910 in words is "twenty-eight million, twenty-two thousand, nine hundred ten".