123440500420 has 48 divisors (see below), whose sum is σ = 271558425600. Its totient is φ = 47070092160.

The previous prime is 123440500357. The next prime is 123440500429. The reversal of 123440500420 is 24005044321.

It is a happy number.

123440500420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (123440500429) 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, 1301196 + ... + 1392835.

It is an arithmetic number, because the mean of its divisors is an integer number (5657467200).

Almost surely, 2^123440500420 is an apocalyptic number.

123440500420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123440500420 is an abundant number, since it is smaller than the sum of its proper divisors (148117925180).

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

123440500420 is a wasteful number, since it uses less digits than its factorization.

123440500420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694148 (or 2694146 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 123440500420 its reverse (24005044321), we get a palindrome (147445544741).

The spelling of 123440500420 in words is "one hundred twenty-three billion, four hundred forty million, five hundred thousand, four hundred twenty".