22520784 has 160 divisors (see below), whose sum is σ = 72745344. Its totient is φ = 5898240.

The previous prime is 22520779. The next prime is 22520789. The reversal of 22520784 is 48702522.

It is an interprime number because it is at equal distance from previous prime (22520779) and next prime (22520789).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22520789) 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 31 ways as a sum of consecutive naturals, for example, 116592 + ... + 116784.

Almost surely, 2^22520784 is an apocalyptic number.

22520784 is a gapful number since it is divisible by the number (24) 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 22520784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36372672).

22520784 is an abundant number, since it is smaller than the sum of its proper divisors (50224560).

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

22520784 is a wasteful number, since it uses less digits than its factorization.

22520784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 22520784 is about 4745.6068105143. The cubic root of 22520784 is about 282.3977085471.

The spelling of 22520784 in words is "twenty-two million, five hundred twenty thousand, seven hundred eighty-four".