22002144 has 24 divisors (see below), whose sum is σ = 57755880. Its totient is φ = 7334016.

The previous prime is 22002121. The next prime is 22002163. The reversal of 22002144 is 44120022.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114499 + ... + 114690.

It is an arithmetic number, because the mean of its divisors is an integer number (2406495).

Almost surely, 2^22002144 is an apocalyptic number.

22002144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22002144 is an abundant number, since it is smaller than the sum of its proper divisors (35753736).

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

22002144 is a wasteful number, since it uses less digits than its factorization.

22002144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229202 (or 229194 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 22002144 is about 4690.6443054233. The cubic root of 22002144 is about 280.2130351522.

Adding to 22002144 its reverse (44120022), we get a palindrome (66122166).

The spelling of 22002144 in words is "twenty-two million, two thousand, one hundred forty-four".