2440403 has 4 divisors (see below), whose sum is σ = 2789040. Its totient is φ = 2091768.

The previous prime is 2440393. The next prime is 2440411. The reversal of 2440403 is 3040442.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3040442 = 2 ⋅1520221.

It is not a de Polignac number, because 2440403 - 2⁴ = 2440387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2440003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174308 + ... + 174321.

It is an arithmetic number, because the mean of its divisors is an integer number (697260).

2^2440403 is an apocalyptic number.

2440403 is a deficient number, since it is larger than the sum of its proper divisors (348637).

2440403 is an equidigital number, since it uses as much as digits as its factorization.

2440403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348636.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 2440403 is about 1562.1789270119. The cubic root of 2440403 is about 134.6337213410.

Adding to 2440403 its reverse (3040442), we get a palindrome (5480845).

The spelling of 2440403 in words is "two million, four hundred forty thousand, four hundred three".