123243432 has 64 divisors (see below), whose sum is σ = 335180160. Its totient is φ = 37536000.

The previous prime is 123243409. The next prime is 123243473. The reversal of 123243432 is 234342321.

It is a super-2 number, since 2×123243432² = 30377887062277248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

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 15 ways as a sum of consecutive naturals, for example, 29557 + ... + 33467.

It is an arithmetic number, because the mean of its divisors is an integer number (5237190).

Almost surely, 2^123243432 is an apocalyptic number.

123243432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123243432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167590080).

123243432 is an abundant number, since it is smaller than the sum of its proper divisors (211936728).

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

123243432 is a wasteful number, since it uses less digits than its factorization.

123243432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034 (or 4030 counting only the distinct ones).

The product of its digits is 3456, while the sum is 24.

The square root of 123243432 is about 11101.5058438034. The cubic root of 123243432 is about 497.6468520967.

Adding to 123243432 its reverse (234342321), we get a palindrome (357585753).

The spelling of 123243432 in words is "one hundred twenty-three million, two hundred forty-three thousand, four hundred thirty-two".