11822220 has 48 divisors (see below), whose sum is σ = 36781920. Its totient is φ = 3152448.

The previous prime is 11822201. The next prime is 11822221. The reversal of 11822220 is 2222811.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 11822193 and 11822202.

It is not an unprimeable number, because it can be changed into a prime (11822221) 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, 10407 + ... + 11486.

It is an arithmetic number, because the mean of its divisors is an integer number (766290).

Almost surely, 2^11822220 is an apocalyptic number.

11822220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11822220 is an abundant number, since it is smaller than the sum of its proper divisors (24959700).

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

11822220 is a wasteful number, since it uses less digits than its factorization.

11822220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21911 (or 21903 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 11822220 is about 3438.3455323745. The cubic root of 11822220 is about 227.8066227378.

The spelling of 11822220 in words is "eleven million, eight hundred twenty-two thousand, two hundred twenty".