22563828 has 144 divisors (see below), whose sum is σ = 72334080. Its totient is φ = 5778432.

The previous prime is 22563803. The next prime is 22563847. The reversal of 22563828 is 82836522.

It is a super-4 number, since 4×22563828⁴ (a number of 31 digits) contains 4444 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 22563792 and 22563801.

It is a congruent number.

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, 98418 + ... + 98646.

It is an arithmetic number, because the mean of its divisors is an integer number (502320).

Almost surely, 2^22563828 is an apocalyptic number.

22563828 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 22563828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36167040).

22563828 is an abundant number, since it is smaller than the sum of its proper divisors (49770252).

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

22563828 is a wasteful number, since it uses less digits than its factorization.

22563828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 281 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 22563828 is about 4750.1397874168. The cubic root of 22563828 is about 282.5775097312.

It can be divided in two parts, 2256 and 3828, that added together give a square (6084 = 78²).

The spelling of 22563828 in words is "twenty-two million, five hundred sixty-three thousand, eight hundred twenty-eight".