1968385 has 4 divisors (see below), whose sum is σ = 2362068. Its totient is φ = 1574704.

The previous prime is 1968383. The next prime is 1968391. The reversal of 1968385 is 5838691.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 410881 + 1557504 = 641^2 + 1248^2 .

It is a cyclic number.

It is not a de Polignac number, because 1968385 - 2¹ = 1968383 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1968383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196834 + ... + 196843.

It is an arithmetic number, because the mean of its divisors is an integer number (590517).

2^1968385 is an apocalyptic number.

It is an amenable number.

1968385 is a deficient number, since it is larger than the sum of its proper divisors (393683).

1968385 is an equidigital number, since it uses as much as digits as its factorization.

1968385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393682.

The product of its digits is 51840, while the sum is 40.

The square root of 1968385 is about 1402.9914468734. The cubic root of 1968385 is about 125.3247024827.

The spelling of 1968385 in words is "one million, nine hundred sixty-eight thousand, three hundred eighty-five".