12289567860 has 120 divisors (see below), whose sum is σ = 38589150600. Its totient is φ = 3274131456.

The previous prime is 12289567847. The next prime is 12289567921. The reversal of 12289567860 is 6876598221.

12289567860 is a `hidden beast` number, since 12 + 2 + 8 + 9 + 567 + 8 + 60 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3964465296 + 8325102564 = 62964^2 + 91242^2 .

It is a super-4 number, since 4×12289567860⁴ (a number of 41 digits) contains 4444 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 12289567797 and 12289567806.

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, 2098216 + ... + 2104064.

It is an arithmetic number, because the mean of its divisors is an integer number (321576255).

Almost surely, 2^12289567860 is an apocalyptic number.

12289567860 is a gapful number since it is divisible by the number (10) 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 12289567860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19294575300).

12289567860 is an abundant number, since it is smaller than the sum of its proper divisors (26299582740).

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

12289567860 is a wasteful number, since it uses less digits than its factorization.

12289567860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7167 (or 7156 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 12289567860 in words is "twelve billion, two hundred eighty-nine million, five hundred sixty-seven thousand, eight hundred sixty".