22145648 has 60 divisors (see below), whose sum is σ = 51059232. Its totient is φ = 9273600.

The previous prime is 22145609. The next prime is 22145653. The reversal of 22145648 is 84654122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36548 + ... + 37148.

Almost surely, 2^22145648 is an apocalyptic number.

22145648 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 22145648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25529616).

22145648 is an abundant number, since it is smaller than the sum of its proper divisors (28913584).

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

22145648 is a wasteful number, since it uses less digits than its factorization.

22145648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 657 counting only the distinct ones).

The product of its digits is 15360, while the sum is 32.

The square root of 22145648 is about 4705.9162763483. The cubic root of 22145648 is about 280.8209241367.

The spelling of 22145648 in words is "twenty-two million, one hundred forty-five thousand, six hundred forty-eight".