11821230 has 96 divisors (see below), whose sum is σ = 33546240. Its totient is φ = 2877120.

The previous prime is 11821223. The next prime is 11821231. The reversal of 11821230 is 3212811.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11821231) 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 47 ways as a sum of consecutive naturals, for example, 52899 + ... + 53121.

It is an arithmetic number, because the mean of its divisors is an integer number (349440).

Almost surely, 2^11821230 is an apocalyptic number.

11821230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11821230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16773120).

11821230 is an abundant number, since it is smaller than the sum of its proper divisors (21725010).

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

11821230 is a wasteful number, since it uses less digits than its factorization.

11821230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 11821230 is about 3438.2015647719. The cubic root of 11821230 is about 227.8002636713.

The spelling of 11821230 in words is "eleven million, eight hundred twenty-one thousand, two hundred thirty".