12238766442 has 96 divisors (see below), whose sum is σ = 32097042432. Its totient is φ = 3422345904.

The previous prime is 12238766431. The next prime is 12238766443. The reversal of 12238766442 is 24466783221.

It is a happy number.

12238766442 is a `hidden beast` number, since 122 + 3 + 87 + 6 + 6 + 442 = 666.

It is not an unprimeable number, because it can be changed into a prime (12238766443) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121623 + ... + 198165.

It is an arithmetic number, because the mean of its divisors is an integer number (334344192).

Almost surely, 2^12238766442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12238766442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16048521216).

12238766442 is an abundant number, since it is smaller than the sum of its proper divisors (19858275990).

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

12238766442 is an equidigital number, since it uses as much as digits as its factorization.

12238766442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76614 (or 76602 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The spelling of 12238766442 in words is "twelve billion, two hundred thirty-eight million, seven hundred sixty-six thousand, four hundred forty-two".