12311488 has 28 divisors (see below), whose sum is σ = 27921712. Its totient is φ = 5276160.

The previous prime is 12311443. The next prime is 12311501. The reversal of 12311488 is 88411321.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13293 + ... + 14188.

It is an arithmetic number, because the mean of its divisors is an integer number (997204).

Almost surely, 2^12311488 is an apocalyptic number.

It is an amenable number.

12311488 is an abundant number, since it is smaller than the sum of its proper divisors (15610224).

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

12311488 is an equidigital number, since it uses as much as digits as its factorization.

12311488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27500 (or 27490 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 12311488 is about 3508.7730049121. The cubic root of 12311488 is about 230.9068669996.

It can be divided in two parts, 123 and 11488, that added together give a palindrome (11611).

The spelling of 12311488 in words is "twelve million, three hundred eleven thousand, four hundred eighty-eight".