22748544 has 288 divisors, whose sum is σ = 84651840. Its totient is φ = 5806080.

The previous prime is 22748519. The next prime is 22748597. The reversal of 22748544 is 44584722.

It is a tau number, because it is divible by the number of its divisors (288).

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

Its product of digits (71680) is a multiple of the sum of its prime divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 22748499 and 22748508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 733809 + ... + 733839.

It is an arithmetic number, because the mean of its divisors is an integer number (293930).

Almost surely, 2^22748544 is an apocalyptic number.

22748544 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 22748544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42325920).

22748544 is an abundant number, since it is smaller than the sum of its proper divisors (61903296).

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

22748544 is a wasteful number, since it uses less digits than its factorization.

22748544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78 (or 56 counting only the distinct ones).

The product of its digits is 71680, while the sum is 36.

The square root of 22748544 is about 4769.5433743703. The cubic root of 22748544 is about 283.3465104214.

It can be divided in two parts, 227485 and 44, that added together give a square (227529 = 477²).

The spelling of 22748544 in words is "twenty-two million, seven hundred forty-eight thousand, five hundred forty-four".