123312432 has 40 divisors (see below), whose sum is σ = 335325760. Its totient is φ = 38940480.

The previous prime is 123312421. The next prime is 123312473. The reversal of 123312432 is 234213321.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 123312399 and 123312408.

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, 66694 + ... + 68517.

It is an arithmetic number, because the mean of its divisors is an integer number (8383144).

Almost surely, 2^123312432 is an apocalyptic number.

123312432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123312432 is an abundant number, since it is smaller than the sum of its proper divisors (212013328).

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

123312432 is a wasteful number, since it uses less digits than its factorization.

123312432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135241 (or 135235 counting only the distinct ones).

The product of its digits is 864, while the sum is 21.

The square root of 123312432 is about 11104.6130954662. The cubic root of 123312432 is about 497.7397068802.

Adding to 123312432 its reverse (234213321), we get a palindrome (357525753).

It can be divided in two parts, 12331 and 2432, that multiplied together give a palindrome (29988992).

The spelling of 123312432 in words is "one hundred twenty-three million, three hundred twelve thousand, four hundred thirty-two".