123321438 has 24 divisors (see below), whose sum is σ = 281260200. Its totient is φ = 38943504.

The previous prime is 123321437. The next prime is 123321461. The reversal of 123321438 is 834123321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123321437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179953 + ... + 180636.

It is an arithmetic number, because the mean of its divisors is an integer number (11719175).

Almost surely, 2^123321438 is an apocalyptic number.

123321438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

123321438 is an abundant number, since it is smaller than the sum of its proper divisors (157938762).

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

123321438 is a wasteful number, since it uses less digits than its factorization.

123321438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360616 (or 360613 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 123321438 is about 11105.0185952118. The cubic root of 123321438 is about 497.7518238923.

Adding to 123321438 its reverse (834123321), we get a palindrome (957444759).

The spelling of 123321438 in words is "one hundred twenty-three million, three hundred twenty-one thousand, four hundred thirty-eight".