440423123140 has 96 divisors (see below), whose sum is σ = 1241808470784. Its totient is φ = 126715138560.

The previous prime is 440423123137. The next prime is 440423123141. The reversal of 440423123140 is 41321324044.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 440423123099 and 440423123108.

It is not an unprimeable number, because it can be changed into a prime (440423123141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10979559 + ... + 11019598.

It is an arithmetic number, because the mean of its divisors is an integer number (12935504904).

Almost surely, 2^440423123140 is an apocalyptic number.

It is an amenable number.

440423123140 is an abundant number, since it is smaller than the sum of its proper divisors (801385347644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

440423123140 is a wasteful number, since it uses less digits than its factorization.

440423123140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21999197 (or 21999195 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 440423123140 its reverse (41321324044), we get a palindrome (481744447184).

The spelling of 440423123140 in words is "four hundred forty billion, four hundred twenty-three million, one hundred twenty-three thousand, one hundred forty".