123831000 has 96 divisors (see below), whose sum is σ = 418579200. Its totient is φ = 33019200.

The previous prime is 123830989. The next prime is 123831031. The reversal of 123831000 is 138321.

It is a super-2 number, since 2×123831000² = 30668233122000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2121 + ... + 15879.

It is an arithmetic number, because the mean of its divisors is an integer number (4360200).

Almost surely, 2^123831000 is an apocalyptic number.

123831000 is a gapful number since it is divisible by the number (10) 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 123831000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209289600).

123831000 is an abundant number, since it is smaller than the sum of its proper divisors (294748200).

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

123831000 is a wasteful number, since it uses less digits than its factorization.

123831000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13786 (or 13769 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 123831000 is about 11127.9378143482. The cubic root of 123831000 is about 498.4364490467.

Adding to 123831000 its reverse (138321), we get a palindrome (123969321).

The spelling of 123831000 in words is "one hundred twenty-three million, eight hundred thirty-one thousand".