123356807388 has 120 divisors (see below), whose sum is σ = 325601869824. Its totient is φ = 40721940000.

The previous prime is 123356807351. The next prime is 123356807389. The reversal of 123356807388 is 883708653321.

123356807388 is a `hidden beast` number, since 1 + 2 + 3 + 3 + 568 + 0 + 73 + 8 + 8 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123356807389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25962013 + ... + 25966763.

Almost surely, 2^123356807388 is an apocalyptic number.

123356807388 is a gapful number since it is divisible by the number (18) 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 123356807388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162800934912).

123356807388 is an abundant number, since it is smaller than the sum of its proper divisors (202245062436).

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

123356807388 is a wasteful number, since it uses less digits than its factorization.

123356807388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5525 (or 5514 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 123356807388 in words is "one hundred twenty-three billion, three hundred fifty-six million, eight hundred seven thousand, three hundred eighty-eight".