1423440403 has 16 divisors (see below), whose sum is σ = 1775554560. Its totient is φ = 1108627200.

The previous prime is 1423440397. The next prime is 1423440409. The reversal of 1423440403 is 3040443241.

It is an interprime number because it is at equal distance from previous prime (1423440397) and next prime (1423440409).

It is a cyclic number.

It is not a de Polignac number, because 1423440403 - 2²¹ = 1421343251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423440409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231118 + ... + 237196.

It is an arithmetic number, because the mean of its divisors is an integer number (110972160).

Almost surely, 2^1423440403 is an apocalyptic number.

1423440403 is a deficient number, since it is larger than the sum of its proper divisors (352114157).

1423440403 is a wasteful number, since it uses less digits than its factorization.

1423440403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9138.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 1423440403 is about 37728.5091542192. The cubic root of 1423440403 is about 1124.8978746472.

Adding to 1423440403 its reverse (3040443241), we get a palindrome (4463883644).

The spelling of 1423440403 in words is "one billion, four hundred twenty-three million, four hundred forty thousand, four hundred three".