123843816 has 80 divisors (see below), whose sum is σ = 348480000. Its totient is φ = 41090976.

The previous prime is 123843803. The next prime is 123843817. The reversal of 123843816 is 618348321.

It is a super-2 number, since 2×123843816² = 30674581522883712, which contains 22 as substring.

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 not an unprimeable number, because it can be changed into a prime (123843817) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 247935 + ... + 248433.

It is an arithmetic number, because the mean of its divisors is an integer number (4356000).

Almost surely, 2^123843816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123843816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174240000).

123843816 is an abundant number, since it is smaller than the sum of its proper divisors (224636184).

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

123843816 is a wasteful number, since it uses less digits than its factorization.

123843816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900 (or 887 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 123843816 is about 11128.5136473835. The cubic root of 123843816 is about 498.4536438287.

It can be divided in two parts, 1238 and 43816, that added together give a palindrome (45054).

The spelling of 123843816 in words is "one hundred twenty-three million, eight hundred forty-three thousand, eight hundred sixteen".