11810988 has 96 divisors (see below), whose sum is σ = 37094400. Its totient is φ = 3172608.

The previous prime is 11810987. The next prime is 11810999. The reversal of 11810988 is 88901811.

It is a super-2 number, since 2×11810988² = 278998875072288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11810987) 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 31 ways as a sum of consecutive naturals, for example, 12393 + ... + 13311.

It is an arithmetic number, because the mean of its divisors is an integer number (386400).

Almost surely, 2^11810988 is an apocalyptic number.

11810988 is a gapful number since it is divisible by the number (18) 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 11810988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18547200).

11810988 is an abundant number, since it is smaller than the sum of its proper divisors (25283412).

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

11810988 is a wasteful number, since it uses less digits than its factorization.

11810988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956 (or 948 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 11810988 is about 3436.7118005442. The cubic root of 11810988 is about 227.7344553913.

The spelling of 11810988 in words is "eleven million, eight hundred ten thousand, nine hundred eighty-eight".