12667788 has 72 divisors (see below), whose sum is σ = 38761632. Its totient is φ = 3405312.

The previous prime is 12667783. The next prime is 12667789. The reversal of 12667788 is 88776621.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12667783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2806 + ... + 5762.

It is an arithmetic number, because the mean of its divisors is an integer number (538356).

Almost surely, 2^12667788 is an apocalyptic number.

12667788 is a gapful number since it is divisible by the number (18) 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 12667788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19380816).

12667788 is an abundant number, since it is smaller than the sum of its proper divisors (26093844).

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

12667788 is a wasteful number, since it uses less digits than its factorization.

12667788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991 (or 2986 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 12667788 is about 3559.1836142576. The cubic root of 12667788 is about 233.1132337187.

The spelling of 12667788 in words is "twelve million, six hundred sixty-seven thousand, seven hundred eighty-eight".