123040344 has 64 divisors (see below), whose sum is σ = 360138240. Its totient is φ = 34295040.

The previous prime is 123040343. The next prime is 123040403. The reversal of 123040344 is 443040321.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 123040344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123040343) 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, 2044 + ... + 15819.

It is an arithmetic number, because the mean of its divisors is an integer number (5627160).

Almost surely, 2^123040344 is an apocalyptic number.

123040344 is a gapful number since it is divisible by the number (14) 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 123040344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180069120).

123040344 is an abundant number, since it is smaller than the sum of its proper divisors (237097896).

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

123040344 is a wasteful number, since it uses less digits than its factorization.

123040344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17920 (or 17916 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 123040344 is about 11092.3552052754. The cubic root of 123040344 is about 497.3733509253.

Adding to 123040344 its reverse (443040321), we get a palindrome (566080665).

The spelling of 123040344 in words is "one hundred twenty-three million, forty thousand, three hundred forty-four".