2191444 has 12 divisors (see below), whose sum is σ = 3907764. Its totient is φ = 1074944.

The previous prime is 2191433. The next prime is 2191451. The reversal of 2191444 is 4441912.

It can be written as a sum of positive squares in 2 ways, for example, as 722500 + 1468944 = 850^2 + 1212^2 .

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, 4957 + ... + 5380.

It is an arithmetic number, because the mean of its divisors is an integer number (325647).

2^2191444 is an apocalyptic number.

It is an amenable number.

2191444 is a deficient number, since it is larger than the sum of its proper divisors (1716320).

2191444 is a wasteful number, since it uses less digits than its factorization.

2191444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10394 (or 10392 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 2191444 is about 1480.3526606860. The cubic root of 2191444 is about 129.8903216939.

The spelling of 2191444 in words is "two million, one hundred ninety-one thousand, four hundred forty-four".