123440613238 has 16 divisors (see below), whose sum is σ = 186695558784. Its totient is φ = 61209645120.

The previous prime is 123440613229. The next prime is 123440613251. The reversal of 123440613238 is 832316044321.

It is a junction number, because it is equal to n+sod(n) for n = 123440613197 and 123440613206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59131 + ... + 500377.

It is an arithmetic number, because the mean of its divisors is an integer number (11668472424).

Almost surely, 2^123440613238 is an apocalyptic number.

123440613238 is a deficient number, since it is larger than the sum of its proper divisors (63254945546).

123440613238 is a wasteful number, since it uses less digits than its factorization.

123440613238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442407.

The product of its (nonzero) digits is 82944, while the sum is 37.

Adding to 123440613238 its reverse (832316044321), we get a palindrome (955756657559).

The spelling of 123440613238 in words is "one hundred twenty-three billion, four hundred forty million, six hundred thirteen thousand, two hundred thirty-eight".