12777888 has 24 divisors (see below), whose sum is σ = 33542208. Its totient is φ = 4259264.

The previous prime is 12777827. The next prime is 12777889. The reversal of 12777888 is 88877721.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12777889) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 66456 + ... + 66647.

It is an arithmetic number, because the mean of its divisors is an integer number (1397592).

Almost surely, 2^12777888 is an apocalyptic number.

It is an amenable number.

12777888 is an abundant number, since it is smaller than the sum of its proper divisors (20764320).

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

12777888 is a wasteful number, since it uses less digits than its factorization.

12777888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133116 (or 133108 counting only the distinct ones).

The product of its digits is 351232, while the sum is 48.

The square root of 12777888 is about 3574.6171823008. The cubic root of 12777888 is about 233.7866416674.

The spelling of 12777888 in words is "twelve million, seven hundred seventy-seven thousand, eight hundred eighty-eight".