12487780 has 48 divisors (see below), whose sum is σ = 27313776. Its totient is φ = 4792320.

The previous prime is 12487757. The next prime is 12487789. The reversal of 12487780 is 8778421.

12487780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2715904 + 9771876 = 1648^2 + 3126^2 .

It is not an unprimeable number, because it can be changed into a prime (12487789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79462 + ... + 79618.

It is an arithmetic number, because the mean of its divisors is an integer number (569037).

Almost surely, 2^12487780 is an apocalyptic number.

12487780 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 12487780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13656888).

12487780 is an abundant number, since it is smaller than the sum of its proper divisors (14825996).

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

12487780 is a wasteful number, since it uses less digits than its factorization.

12487780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 12487780 is about 3533.8053143884. The cubic root of 12487780 is about 232.0037900689.

The spelling of 12487780 in words is "twelve million, four hundred eighty-seven thousand, seven hundred eighty".