12238455078 has 80 divisors (see below), whose sum is σ = 28225834560. Its totient is φ = 3961767024.

The previous prime is 12238455029. The next prime is 12238455083. The reversal of 12238455078 is 87055483221.

12238455078 is a `hidden beast` number, since 1 + 2 + 23 + 8 + 4 + 550 + 78 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 785601 + ... + 801027.

It is an arithmetic number, because the mean of its divisors is an integer number (352822932).

Almost surely, 2^12238455078 is an apocalyptic number.

12238455078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12238455078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14112917280).

12238455078 is an abundant number, since it is smaller than the sum of its proper divisors (15987379482).

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

12238455078 is a wasteful number, since it uses less digits than its factorization.

12238455078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15583 (or 15574 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 12238455078 in words is "twelve billion, two hundred thirty-eight million, four hundred fifty-five thousand, seventy-eight".