123040423044 has 72 divisors (see below), whose sum is σ = 387763766208. Its totient is φ = 31958550720.

The previous prime is 123040423021. The next prime is 123040423049. The reversal of 123040423044 is 440324040321.

It is a happy number.

123040423044 is a `hidden beast` number, since 1 + 23 + 0 + 404 + 230 + 4 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 123040422999 and 123040423017.

It is not an unprimeable number, because it can be changed into a prime (123040423049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22190667 + ... + 22196210.

It is an arithmetic number, because the mean of its divisors is an integer number (5385607864).

Almost surely, 2^123040423044 is an apocalyptic number.

123040423044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

123040423044 is an abundant number, since it is smaller than the sum of its proper divisors (264723343164).

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

123040423044 is a wasteful number, since it uses less digits than its factorization.

123040423044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44386905 (or 44386900 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 123040423044 its reverse (440324040321), we get a palindrome (563364463365).

The spelling of 123040423044 in words is "one hundred twenty-three billion, forty million, four hundred twenty-three thousand, forty-four".