123326478 has 24 divisors (see below), whose sum is σ = 291499416. Its totient is φ = 37371600.

The previous prime is 123326471. The next prime is 123326491. The reversal of 123326478 is 874623321.

It is a happy number.

123326478 is a `hidden beast` number, since 1 + 2 + 3 + 3 + 2 + 647 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123326471) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 311233 + ... + 311628.

It is an arithmetic number, because the mean of its divisors is an integer number (12145809).

Almost surely, 2^123326478 is an apocalyptic number.

123326478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

123326478 is an abundant number, since it is smaller than the sum of its proper divisors (168172938).

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

123326478 is a wasteful number, since it uses less digits than its factorization.

123326478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622880 (or 622877 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 123326478 is about 11105.2455173220. The cubic root of 123326478 is about 497.7586046409.

Adding to 123326478 its reverse (874623321), we get a palindrome (997949799).

The spelling of 123326478 in words is "one hundred twenty-three million, three hundred twenty-six thousand, four hundred seventy-eight".