123243984 has 40 divisors (see below), whose sum is σ = 353757120. Its totient is φ = 41081184.

The previous prime is 123243947. The next prime is 123244007. The reversal of 123243984 is 489342321.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a congruent number.

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, 142212 + ... + 143075.

It is an arithmetic number, because the mean of its divisors is an integer number (8843928).

Almost surely, 2^123243984 is an apocalyptic number.

It is an amenable number.

123243984 is an abundant number, since it is smaller than the sum of its proper divisors (230513136).

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

123243984 is a wasteful number, since it uses less digits than its factorization.

123243984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285304 (or 285292 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 123243984 is about 11101.5307052676. The cubic root of 123243984 is about 497.6475950725.

The spelling of 123243984 in words is "one hundred twenty-three million, two hundred forty-three thousand, nine hundred eighty-four".