123432312 has 16 divisors (see below), whose sum is σ = 308580840. Its totient is φ = 41144096.

The previous prime is 123432277. The next prime is 123432319. The reversal of 123432312 is 213234321.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123432319) 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 3 ways as a sum of consecutive naturals, for example, 2571483 + ... + 2571530.

Almost surely, 2^123432312 is an apocalyptic number.

123432312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123432312 is an abundant number, since it is smaller than the sum of its proper divisors (185148528).

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

123432312 is a wasteful number, since it uses less digits than its factorization.

123432312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5143022 (or 5143018 counting only the distinct ones).

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

The square root of 123432312 is about 11110.0095409500. The cubic root of 123432312 is about 497.9009496398.

Adding to 123432312 its reverse (213234321), we get a palindrome (336666633).

The spelling of 123432312 in words is "one hundred twenty-three million, four hundred thirty-two thousand, three hundred twelve".