12311772 has 48 divisors (see below), whose sum is σ = 32995200. Its totient is φ = 3533760.

The previous prime is 12311771. The next prime is 12311777. The reversal of 12311772 is 27711321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54 + ... + 4962.

It is an arithmetic number, because the mean of its divisors is an integer number (687400).

Almost surely, 2^12311772 is an apocalyptic number.

12311772 is a gapful number since it is divisible by the number (12) 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 12311772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16497600).

12311772 is an abundant number, since it is smaller than the sum of its proper divisors (20683428).

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

12311772 is a wasteful number, since it uses less digits than its factorization.

12311772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4946 (or 4944 counting only the distinct ones).

The product of its digits is 588, while the sum is 24.

The square root of 12311772 is about 3508.8134746663. The cubic root of 12311772 is about 230.9086424970.

It can be divided in two parts, 1231 and 1772, that added together give a palindrome (3003).

The spelling of 12311772 in words is "twelve million, three hundred eleven thousand, seven hundred seventy-two".