123343440 has 160 divisors (see below), whose sum is σ = 439257600. Its totient is φ = 28316160.

The previous prime is 123343417. The next prime is 123343447. The reversal of 123343440 is 44343321.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 123343440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123343447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48931 + ... + 51389.

It is an arithmetic number, because the mean of its divisors is an integer number (2745360).

Almost surely, 2^123343440 is an apocalyptic number.

123343440 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 123343440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219628800).

123343440 is an abundant number, since it is smaller than the sum of its proper divisors (315914160).

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

123343440 is a wasteful number, since it uses less digits than its factorization.

123343440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2505 (or 2499 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 123343440 is about 11106.0091842209. The cubic root of 123343440 is about 497.7814237320.

Adding to 123343440 its reverse (44343321), we get a palindrome (167686761).

The spelling of 123343440 in words is "one hundred twenty-three million, three hundred forty-three thousand, four hundred forty".