22091444 has 6 divisors (see below), whose sum is σ = 38660034. Its totient is φ = 11045720.

The previous prime is 22091423. The next prime is 22091453. The reversal of 22091444 is 44419022.

It can be written as a sum of positive squares in only one way, i.e., 22090000 + 1444 = 4700^2 + 38^2 .

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 as a sum of consecutive naturals, namely, 2761427 + ... + 2761434.

It is an arithmetic number, because the mean of its divisors is an integer number (6443339).

Almost surely, 2^22091444 is an apocalyptic number.

It is an amenable number.

22091444 is a deficient number, since it is larger than the sum of its proper divisors (16568590).

22091444 is a wasteful number, since it uses less digits than its factorization.

22091444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5522865 (or 5522863 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 22091444 is about 4700.1536145109. The cubic root of 22091444 is about 280.5916232049.

It can be divided in two parts, 2209 and 1444, that multiplied together give a square (3189796 = 1786²).

The spelling of 22091444 in words is "twenty-two million, ninety-one thousand, four hundred forty-four".