123443453140 has 96 divisors (see below), whose sum is σ = 304680499200. Its totient is φ = 41131069056.

The previous prime is 123443453123. The next prime is 123443453173. The reversal of 123443453140 is 41354344321.

It is a super-2 number, since 2×123443453140² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123443453096 and 123443453105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1146459 + ... + 1249501.

It is an arithmetic number, because the mean of its divisors is an integer number (3173755200).

Almost surely, 2^123443453140 is an apocalyptic number.

123443453140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123443453140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152340249600).

123443453140 is an abundant number, since it is smaller than the sum of its proper divisors (181237046060).

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

123443453140 is a wasteful number, since it uses less digits than its factorization.

123443453140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103301 (or 103299 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 123443453140 its reverse (41354344321), we get a palindrome (164797797461).

The spelling of 123443453140 in words is "one hundred twenty-three billion, four hundred forty-three million, four hundred fifty-three thousand, one hundred forty".