123238438 has 16 divisors (see below), whose sum is σ = 186416640. Its totient is φ = 61102216.

The previous prime is 123238421. The next prime is 123238447. The reversal of 123238438 is 834832321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165495 + ... + 166237.

It is an arithmetic number, because the mean of its divisors is an integer number (11651040).

Almost surely, 2^123238438 is an apocalyptic number.

123238438 is a deficient number, since it is larger than the sum of its proper divisors (63178202).

123238438 is a wasteful number, since it uses less digits than its factorization.

123238438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331.

The product of its digits is 27648, while the sum is 34.

The square root of 123238438 is about 11101.2809170834. The cubic root of 123238438 is about 497.6401302187.

The spelling of 123238438 in words is "one hundred twenty-three million, two hundred thirty-eight thousand, four hundred thirty-eight".