1940289 has 24 divisors (see below), whose sum is σ = 2898720. Its totient is φ = 1153152.

The previous prime is 1940269. The next prime is 1940293. The reversal of 1940289 is 9820491.

It is not a de Polignac number, because 1940289 - 2¹⁷ = 1809217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1940219) 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 23 ways as a sum of consecutive naturals, for example, 21757 + ... + 21845.

It is an arithmetic number, because the mean of its divisors is an integer number (120780).

2^1940289 is an apocalyptic number.

It is an amenable number.

1940289 is a deficient number, since it is larger than the sum of its proper divisors (958431).

1940289 is a wasteful number, since it uses less digits than its factorization.

1940289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 1940289 is about 1392.9425688089. The cubic root of 1940289 is about 124.7255632500.

It can be divided in two parts, 19402 and 89, that added together give a palindrome (19491).

The spelling of 1940289 in words is "one million, nine hundred forty thousand, two hundred eighty-nine".