2091444 has 24 divisors (see below), whose sum is σ = 5137440. Its totient is φ = 660384.

The previous prime is 2091443. The next prime is 2091449. The reversal of 2091444 is 4441902.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091443) 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, 4359 + ... + 4814.

It is an arithmetic number, because the mean of its divisors is an integer number (214060).

2^2091444 is an apocalyptic number.

It is an amenable number.

2091444 is an abundant number, since it is smaller than the sum of its proper divisors (3045996).

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

2091444 is a wasteful number, since it uses less digits than its factorization.

2091444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9199 (or 9197 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 2091444 is about 1446.1825610897. The cubic root of 2091444 is about 127.8837649231.

It can be divided in two parts, 209 and 1444, that added together give a triangular number (1653 = T₅₇).

The spelling of 2091444 in words is "two million, ninety-one thousand, four hundred forty-four".