1044400403 has 4 divisors (see below), whose sum is σ = 1080414240. Its totient is φ = 1008386568.

The previous prime is 1044400397. The next prime is 1044400411. The reversal of 1044400403 is 3040044401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3040044401 = 43 ⋅70698707.

It is a cyclic number.

It is not a de Polignac number, because 1044400403 - 2⁴ = 1044400387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1044400103) 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, 18006875 + ... + 18006932.

It is an arithmetic number, because the mean of its divisors is an integer number (270103560).

Almost surely, 2^1044400403 is an apocalyptic number.

1044400403 is a deficient number, since it is larger than the sum of its proper divisors (36013837).

1044400403 is an equidigital number, since it uses as much as digits as its factorization.

1044400403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36013836.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1044400403 is about 32317.1843297030. The cubic root of 1044400403 is about 1014.5863385905.

Adding to 1044400403 its reverse (3040044401), we get a palindrome (4084444804).

The spelling of 1044400403 in words is "one billion, forty-four million, four hundred thousand, four hundred three".