123313401240 has 128 divisors (see below), whose sum is σ = 371508318720. Its totient is φ = 32744448000.

The previous prime is 123313401227. The next prime is 123313401251. The reversal of 123313401240 is 42104313321.

It is a happy number.

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 123313401240.

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, 48337965 + ... + 48340515.

It is an arithmetic number, because the mean of its divisors is an integer number (2902408740).

Almost surely, 2^123313401240 is an apocalyptic number.

123313401240 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 123313401240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185754159360).

123313401240 is an abundant number, since it is smaller than the sum of its proper divisors (248194917480).

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

123313401240 is a wasteful number, since it uses less digits than its factorization.

123313401240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4113 (or 4109 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 123313401240 its reverse (42104313321), we get a palindrome (165417714561).

The spelling of 123313401240 in words is "one hundred twenty-three billion, three hundred thirteen million, four hundred one thousand, two hundred forty".