12311000 has 64 divisors (see below), whose sum is σ = 31056480. Its totient is φ = 4540800.

The previous prime is 12310997. The next prime is 12311017. The reversal of 12311000 is 11321.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12527 + ... + 13473.

Almost surely, 2^12311000 is an apocalyptic number.

12311000 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 12311000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15528240).

12311000 is an abundant number, since it is smaller than the sum of its proper divisors (18745480).

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

12311000 is a wasteful number, since it uses less digits than its factorization.

12311000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981 (or 967 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 12311000 is about 3508.7034642443. The cubic root of 12311000 is about 230.9038160811.

Adding to 12311000 its reverse (11321), we get a palindrome (12322321).

The spelling of 12311000 in words is "twelve million, three hundred eleven thousand".