1919844 has 36 divisors (see below), whose sum is σ = 5140044. Its totient is φ = 602112.

The previous prime is 1919843. The next prime is 1919851. The reversal of 1919844 is 4489191.

It can be written as a sum of positive squares in 2 ways, for example, as 1790244 + 129600 = 1338^2 + 360^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1919799 and 1919808.

It is not an unprimeable number, because it can be changed into a prime (1919843) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 957 + ... + 2180.

It is an arithmetic number, because the mean of its divisors is an integer number (142779).

2^1919844 is an apocalyptic number.

It is an amenable number.

1919844 is an abundant number, since it is smaller than the sum of its proper divisors (3220200).

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

1919844 is a wasteful number, since it uses less digits than its factorization.

1919844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3164 (or 3159 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1919844 is about 1385.5843532604. The cubic root of 1919844 is about 124.2859339784.

The spelling of 1919844 in words is "one million, nine hundred nineteen thousand, eight hundred forty-four".