12023220 has 48 divisors (see below), whose sum is σ = 36727488. Its totient is φ = 2914560.

The previous prime is 12023191. The next prime is 12023239. The reversal of 12023220 is 2232021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12023196 and 12023205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8449 + ... + 9768.

It is an arithmetic number, because the mean of its divisors is an integer number (765156).

Almost surely, 2^12023220 is an apocalyptic number.

12023220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12023220 is an abundant number, since it is smaller than the sum of its proper divisors (24704268).

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

12023220 is a wasteful number, since it uses less digits than its factorization.

12023220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18240 (or 18238 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 12023220 is about 3467.4515137201. The cubic root of 12023220 is about 229.0904215043.

Adding to 12023220 its reverse (2232021), we get a palindrome (14255241).

The spelling of 12023220 in words is "twelve million, twenty-three thousand, two hundred twenty".