12289315788 has 84 divisors (see below), whose sum is σ = 32931128160. Its totient is φ = 4009235616.

The previous prime is 12289315781. The next prime is 12289315789. The reversal of 12289315788 is 88751398221.

12289315788 is a `hidden beast` number, since 12 + 28 + 9 + 31 + 578 + 8 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (12289315781) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 92218 + ... + 181886.

It is an arithmetic number, because the mean of its divisors is an integer number (392037240).

Almost surely, 2^12289315788 is an apocalyptic number.

12289315788 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 12289315788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16465564080).

12289315788 is an abundant number, since it is smaller than the sum of its proper divisors (20641812372).

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

12289315788 is an equidigital number, since it uses as much as digits as its factorization.

12289315788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89738 (or 89721 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The spelling of 12289315788 in words is "twelve billion, two hundred eighty-nine million, three hundred fifteen thousand, seven hundred eighty-eight".