22173844 has 24 divisors (see below), whose sum is σ = 48379968. Its totient is φ = 8639040.

The previous prime is 22173829. The next prime is 22173847. The reversal of 22173844 is 44837122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22173847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35689 + ... + 36304.

It is an arithmetic number, because the mean of its divisors is an integer number (2015832).

Almost surely, 2^22173844 is an apocalyptic number.

It is an amenable number.

22173844 is an abundant number, since it is smaller than the sum of its proper divisors (26206124).

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

22173844 is a wasteful number, since it uses less digits than its factorization.

22173844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72015 (or 72013 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 22173844 is about 4708.9111267893. The cubic root of 22173844 is about 280.9400546723.

Subtracting 22173844 from its reverse (44837122), we obtain a triangular number (22663278 = T₆₇₃₂).

The spelling of 22173844 in words is "twenty-two million, one hundred seventy-three thousand, eight hundred forty-four".