12139288 has 32 divisors (see below), whose sum is σ = 26150400. Its totient is φ = 5175072.

The previous prime is 12139277. The next prime is 12139289. The reversal of 12139288 is 88293121.

12139288 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12139289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12931 + ... + 13837.

It is an arithmetic number, because the mean of its divisors is an integer number (817200).

Almost surely, 2^12139288 is an apocalyptic number.

It is an amenable number.

12139288 is an abundant number, since it is smaller than the sum of its proper divisors (14011112).

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

12139288 is a wasteful number, since it uses less digits than its factorization.

12139288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159 (or 1155 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 12139288 is about 3484.1481024778. The cubic root of 12139288 is about 229.8252484817.

It can be divided in two parts, 1213 and 9288, that added together give a palindrome (10501).

The spelling of 12139288 in words is "twelve million, one hundred thirty-nine thousand, two hundred eighty-eight".