12776500 has 96 divisors (see below), whose sum is σ = 32078592. Its totient is φ = 4400000.

The previous prime is 12776473. The next prime is 12776513. The reversal of 12776500 is 567721.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its 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 (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126450 + ... + 126550.

It is an arithmetic number, because the mean of its divisors is an integer number (334152).

Almost surely, 2^12776500 is an apocalyptic number.

12776500 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 12776500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16039296).

12776500 is an abundant number, since it is smaller than the sum of its proper divisors (19302092).

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

12776500 is a wasteful number, since it uses less digits than its factorization.

12776500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 12776500 is about 3574.4230303645. The cubic root of 12776500 is about 233.7781763246.

It can be divided in two parts, 1277 and 6500, that added together give a palindrome (7777).

The spelling of 12776500 in words is "twelve million, seven hundred seventy-six thousand, five hundred".