440020133423 has 16 divisors (see below), whose sum is σ = 477941651040. Its totient is φ = 402692788224.

The previous prime is 440020133419. The next prime is 440020133507. The reversal of 440020133423 is 324331020044.

It is a cyclic number.

It is not a de Polignac number, because 440020133423 - 2² = 440020133419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 440020133392 and 440020133401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440020133323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 612815 + ... + 1120527.

It is an arithmetic number, because the mean of its divisors is an integer number (29871353190).

Almost surely, 2^440020133423 is an apocalyptic number.

440020133423 is a deficient number, since it is larger than the sum of its proper divisors (37921517617).

440020133423 is a wasteful number, since it uses less digits than its factorization.

440020133423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508298.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 440020133423 its reverse (324331020044), we get a palindrome (764351153467).

The spelling of 440020133423 in words is "four hundred forty billion, twenty million, one hundred thirty-three thousand, four hundred twenty-three".