22287648 has 48 divisors (see below), whose sum is σ = 58877280. Its totient is φ = 7382016.

The previous prime is 22287623. The next prime is 22287659. The reversal of 22287648 is 84678222.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16536 + ... + 17832.

It is an arithmetic number, because the mean of its divisors is an integer number (1226610).

Almost surely, 2^22287648 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 22287648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29438640).

22287648 is an abundant number, since it is smaller than the sum of its proper divisors (36589632).

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

22287648 is a wasteful number, since it uses less digits than its factorization.

22287648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489 (or 1481 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 22287648 is about 4720.9795593711. The cubic root of 22287648 is about 281.4198626244.

The spelling of 22287648 in words is "twenty-two million, two hundred eighty-seven thousand, six hundred forty-eight".