1994144 has 24 divisors (see below), whose sum is σ = 3971268. Its totient is φ = 985600.

The previous prime is 1994143. The next prime is 1994191. The reversal of 1994144 is 4414991.

It can be written as a sum of positive squares in 2 ways, for example, as 1993744 + 400 = 1412^2 + 20^2 .

It is a super-2 number, since 2×1994144² = 7953220585472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1994144.

It is not an unprimeable number, because it can be changed into a prime (1994143) 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 3 ways as a sum of consecutive naturals, for example, 2924 + ... + 3540.

2^1994144 is an apocalyptic number.

It is an amenable number.

1994144 is a deficient number, since it is larger than the sum of its proper divisors (1977124).

1994144 is a wasteful number, since it uses less digits than its factorization.

1994144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728 (or 720 counting only the distinct ones).

The product of its digits is 5184, while the sum is 32.

The square root of 1994144 is about 1412.1416359558. The cubic root of 1994144 is about 125.8690164824.

The spelling of 1994144 in words is "one million, nine hundred ninety-four thousand, one hundred forty-four".