12311040 has 160 divisors (see below), whose sum is σ = 45175680. Its totient is φ = 2801664.

The previous prime is 12311027. The next prime is 12311053. The reversal of 12311040 is 4011321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12311027) and next prime (12311053).

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 53646 + ... + 53874.

It is an arithmetic number, because the mean of its divisors is an integer number (282348).

Almost surely, 2^12311040 is an apocalyptic number.

12311040 is a gapful number since it is divisible by the number (10) 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 12311040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22587840).

12311040 is an abundant number, since it is smaller than the sum of its proper divisors (32864640).

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

12311040 is an equidigital number, since it uses as much as digits as its factorization.

12311040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 12311040 is about 3508.7091643509. The cubic root of 12311040 is about 230.9040661594.

Adding to 12311040 its reverse (4011321), we get a palindrome (16322361).

The spelling of 12311040 in words is "twelve million, three hundred eleven thousand, forty".