12778860 has 24 divisors (see below), whose sum is σ = 35780976. Its totient is φ = 3407680.

The previous prime is 12778859. The next prime is 12778873. The reversal of 12778860 is 6887721.

12778860 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106431 + ... + 106550.

It is an arithmetic number, because the mean of its divisors is an integer number (1490874).

Almost surely, 2^12778860 is an apocalyptic number.

12778860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12778860 is an abundant number, since it is smaller than the sum of its proper divisors (23002116).

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

12778860 is a wasteful number, since it uses less digits than its factorization.

12778860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212993 (or 212991 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 12778860 is about 3574.7531383300. The cubic root of 12778860 is about 233.7925694820.

It can be divided in two parts, 127 and 78860, that added together give a palindrome (78987).

The spelling of 12778860 in words is "twelve million, seven hundred seventy-eight thousand, eight hundred sixty".