1040440423 has 8 divisors (see below), whose sum is σ = 1135282176. Its totient is φ = 945641400.

The previous prime is 1040440417. The next prime is 1040440447. The reversal of 1040440423 is 3240440401.

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

It is not a de Polignac number, because 1040440423 - 2⁵ = 1040440391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1040440394 and 1040440403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040440463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61440 + ... + 76522.

It is an arithmetic number, because the mean of its divisors is an integer number (141910272).

Almost surely, 2^1040440423 is an apocalyptic number.

1040440423 is a deficient number, since it is larger than the sum of its proper divisors (94841753).

1040440423 is a wasteful number, since it uses less digits than its factorization.

1040440423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21365.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1040440423 is about 32255.8587391500. The cubic root of 1040440423 is about 1013.3024024516.

Subtracting from 1040440423 its sum of digits (22), we obtain a palindrome (1040440401).

Adding to 1040440423 its reverse (3240440401), we get a palindrome (4280880824).

The spelling of 1040440423 in words is "one billion, forty million, four hundred forty thousand, four hundred twenty-three".