12777912 has 112 divisors (see below), whose sum is σ = 41184240. Its totient is φ = 3639168.

The previous prime is 12777911. The next prime is 12777917. The reversal of 12777912 is 21977721.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12777911) by changing a digit.

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 27 ways as a sum of consecutive naturals, for example, 40668 + ... + 40980.

Almost surely, 2^12777912 is an apocalyptic number.

12777912 is a gapful number since it is divisible by the number (12) 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 12777912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20592120).

12777912 is an abundant number, since it is smaller than the sum of its proper divisors (28406328).

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

12777912 is an equidigital number, since it uses as much as digits as its factorization.

12777912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 325 counting only the distinct ones).

The product of its digits is 12348, while the sum is 36.

The square root of 12777912 is about 3574.6205393020. The cubic root of 12777912 is about 233.7867880368.

It can be divided in two parts, 12777 and 912, that added together give a square (13689 = 117²).

The spelling of 12777912 in words is "twelve million, seven hundred seventy-seven thousand, nine hundred twelve".