1940305 has 8 divisors (see below), whose sum is σ = 2338344. Its totient is φ = 1545600.

The previous prime is 1940293. The next prime is 1940327. The reversal of 1940305 is 5030491.

It can be written as a sum of positive squares in 4 ways, for example, as 278784 + 1661521 = 528^2 + 1289^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1940305 - 2¹¹ = 1938257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 715 + ... + 2095.

It is an arithmetic number, because the mean of its divisors is an integer number (292293).

2^1940305 is an apocalyptic number.

It is an amenable number.

1940305 is a deficient number, since it is larger than the sum of its proper divisors (398039).

1940305 is a wasteful number, since it uses less digits than its factorization.

1940305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1940305 is about 1392.9483120346. The cubic root of 1940305 is about 124.7259060862.

Adding to 1940305 its reverse (5030491), we get a palindrome (6970796).

The spelling of 1940305 in words is "one million, nine hundred forty thousand, three hundred five".