4040393 has 6 divisors (see below), whose sum is σ = 4700106. Its totient is φ = 3463152.

The previous prime is 4040389. The next prime is 4040401. The reversal of 4040393 is 3930404.

It can be written as a sum of positive squares in only one way, i.e., 3286969 + 753424 = 1813^2 + 868^2 .

It is not a de Polignac number, because 4040393 - 2² = 4040389 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4040353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41180 + ... + 41277.

It is an arithmetic number, because the mean of its divisors is an integer number (783351).

Almost surely, 2^4040393 is an apocalyptic number.

It is an amenable number.

4040393 is a deficient number, since it is larger than the sum of its proper divisors (659713).

4040393 is an equidigital number, since it uses as much as digits as its factorization.

4040393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82471 (or 82464 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 4040393 is about 2010.0728842507. The cubic root of 4040393 is about 159.2726490348.

Adding to 4040393 its reverse (3930404), we get a palindrome (7970797).

The spelling of 4040393 in words is "four million, forty thousand, three hundred ninety-three".