123443120 has 80 divisors (see below), whose sum is σ = 306542880. Its totient is φ = 46067712.

The previous prime is 123443113. The next prime is 123443123. The reversal of 123443120 is 21344321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 123443092 and 123443101.

It is not an unprimeable number, because it can be changed into a prime (123443123) 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, 188714 + ... + 189366.

It is an arithmetic number, because the mean of its divisors is an integer number (3831786).

Almost surely, 2^123443120 is an apocalyptic number.

123443120 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 123443120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153271440).

123443120 is an abundant number, since it is smaller than the sum of its proper divisors (183099760).

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

123443120 is a wasteful number, since it uses less digits than its factorization.

123443120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 123443120 is about 11110.4959385259. The cubic root of 123443120 is about 497.9154816434.

Adding to 123443120 its reverse (21344321), we get a palindrome (144787441).

The spelling of 123443120 in words is "one hundred twenty-three million, four hundred forty-three thousand, one hundred twenty".