28222524 has 144 divisors (see below), whose sum is σ = 85263360. Its totient is φ = 7840800.

The previous prime is 28222517. The next prime is 28222529. The reversal of 28222524 is 42522282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28222529) 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 47 ways as a sum of consecutive naturals, for example, 910389 + ... + 910419.

Almost surely, 2^28222524 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 28222524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42631680).

28222524 is an abundant number, since it is smaller than the sum of its proper divisors (57040836).

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

28222524 is a wasteful number, since it uses less digits than its factorization.

28222524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93 (or 66 counting only the distinct ones).

The product of its digits is 5120, while the sum is 27.

The square root of 28222524 is about 5312.4875529266. The cubic root of 28222524 is about 304.4611968965.

The spelling of 28222524 in words is "twenty-eight million, two hundred twenty-two thousand, five hundred twenty-four".