11311812 has 30 divisors (see below), whose sum is σ = 29572158. Its totient is φ = 3770496.

The previous prime is 11311801. The next prime is 11311813. The reversal of 11311812 is 21811311.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9585216 + 1726596 = 3096^2 + 1314^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (11311813) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 17133 + ... + 17780.

Almost surely, 2^11311812 is an apocalyptic number.

11311812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11311812 is an abundant number, since it is smaller than the sum of its proper divisors (18260346).

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

11311812 is a wasteful number, since it uses less digits than its factorization.

11311812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34929 (or 34918 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

The square root of 11311812 is about 3363.3037329388. The cubic root of 11311812 is about 224.4798651922.

The spelling of 11311812 in words is "eleven million, three hundred eleven thousand, eight hundred twelve".