22084428 has 48 divisors (see below), whose sum is σ = 56458080. Its totient is φ = 6687744.

The previous prime is 22084427. The next prime is 22084451. The reversal of 22084428 is 82448022.

It is a junction number, because it is equal to n+sod(n) for n = 22084395 and 22084404.

It is not an unprimeable number, because it can be changed into a prime (22084427) 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 15 ways as a sum of consecutive naturals, for example, 4050 + ... + 7782.

It is an arithmetic number, because the mean of its divisors is an integer number (1176210).

Almost surely, 2^22084428 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 22084428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28229040).

22084428 is an abundant number, since it is smaller than the sum of its proper divisors (34373652).

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

22084428 is a wasteful number, since it uses less digits than its factorization.

22084428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3786 (or 3784 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 30.

The square root of 22084428 is about 4699.4071966579. The cubic root of 22084428 is about 280.5619157871.

It can be divided in two parts, 220 and 84428, that added together give a palindrome (84648).

The spelling of 22084428 in words is "twenty-two million, eighty-four thousand, four hundred twenty-eight".