123786036 has 96 divisors (see below), whose sum is σ = 362275200. Its totient is φ = 36207360.

The previous prime is 123786031. The next prime is 123786043. The reversal of 123786036 is 630687321.

It is a happy number.

123786036 is a `hidden beast` number, since 12 + 37 + 8 + 603 + 6 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123786031) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 32656 + ... + 36248.

It is an arithmetic number, because the mean of its divisors is an integer number (3773700).

Almost surely, 2^123786036 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 123786036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181137600).

123786036 is an abundant number, since it is smaller than the sum of its proper divisors (238489164).

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

123786036 is a wasteful number, since it uses less digits than its factorization.

123786036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3646 (or 3638 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 123786036 is about 11125.9173104962. The cubic root of 123786036 is about 498.3761130251.

The spelling of 123786036 in words is "one hundred twenty-three million, seven hundred eighty-six thousand, thirty-six".