12387185280 has 512 divisors, whose sum is σ = 47809440000. Its totient is φ = 3019161600.

The previous prime is 12387185257. The next prime is 12387185323. The reversal of 12387185280 is 8258178321.

12387185280 is a `hidden beast` number, since 12 + 387 + 185 + 2 + 80 = 666.

It is a super-2 number, since 2×12387185280² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9520630 + ... + 9521930.

Almost surely, 2^12387185280 is an apocalyptic number.

12387185280 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 12387185280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23904720000).

12387185280 is an abundant number, since it is smaller than the sum of its proper divisors (35422254720).

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

12387185280 is a wasteful number, since it uses less digits than its factorization.

12387185280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377 (or 1359 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The spelling of 12387185280 in words is "twelve billion, three hundred eighty-seven million, one hundred eighty-five thousand, two hundred eighty".