12387894580 has 24 divisors (see below), whose sum is σ = 26505421992. Its totient is φ = 4861663872.

The previous prime is 12387894487. The next prime is 12387894601. The reversal of 12387894580 is 8549878321.

It can be written as a sum of positive squares in 4 ways, for example, as 6503777316 + 5884117264 = 80646^2 + 76708^2 .

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5842287 + ... + 5844406.

It is an arithmetic number, because the mean of its divisors is an integer number (1104392583).

Almost surely, 2^12387894580 is an apocalyptic number.

12387894580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12387894580 is an abundant number, since it is smaller than the sum of its proper divisors (14117527412).

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

12387894580 is a wasteful number, since it uses less digits than its factorization.

12387894580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11686755 (or 11686753 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 12387894580 in words is "twelve billion, three hundred eighty-seven million, eight hundred ninety-four thousand, five hundred eighty".