123844697820 has 96 divisors (see below), whose sum is σ = 385536782400. Its totient is φ = 33004495872.

The previous prime is 123844697803. The next prime is 123844697831. The reversal of 123844697820 is 28796448321.

123844697820 is a `hidden beast` number, since 1 + 2 + 38 + 446 + 97 + 82 + 0 = 666.

It is a super-2 number, since 2×123844697820² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 797592 + ... + 940128.

It is an arithmetic number, because the mean of its divisors is an integer number (4016008150).

Almost surely, 2^123844697820 is an apocalyptic number.

123844697820 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 123844697820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192768391200).

123844697820 is an abundant number, since it is smaller than the sum of its proper divisors (261692084580).

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

123844697820 is a wasteful number, since it uses less digits than its factorization.

123844697820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144164 (or 144156 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 123844697820 in words is "one hundred twenty-three billion, eight hundred forty-four million, six hundred ninety-seven thousand, eight hundred twenty".