2040393 has 8 divisors (see below), whose sum is σ = 2783968. Its totient is φ = 1328544.

The previous prime is 2040377. The next prime is 2040403. The reversal of 2040393 is 3930402.

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

It is not a de Polignac number, because 2040393 - 2⁴ = 2040377 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

2040393 is a lucky number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (2040193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7780 + ... + 8037.

It is an arithmetic number, because the mean of its divisors is an integer number (347996).

2^2040393 is an apocalyptic number.

It is an amenable number.

2040393 is a deficient number, since it is larger than the sum of its proper divisors (743575).

2040393 is a wasteful number, since it uses less digits than its factorization.

2040393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15863.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 2040393 is about 1428.4232566015. The cubic root of 2040393 is about 126.8346578364.

Adding to 2040393 its reverse (3930402), we get a palindrome (5970795).

The spelling of 2040393 in words is "two million, forty thousand, three hundred ninety-three".