12203940 has 96 divisors (see below), whose sum is σ = 39916800. Its totient is φ = 2784768.

The previous prime is 12203929. The next prime is 12203941. The reversal of 12203940 is 4930221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12203941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20284 + ... + 20876.

It is an arithmetic number, because the mean of its divisors is an integer number (415800).

Almost surely, 2^12203940 is an apocalyptic number.

12203940 is a gapful number since it is divisible by the number (10) 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 12203940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19958400).

12203940 is an abundant number, since it is smaller than the sum of its proper divisors (27712860).

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

12203940 is a wasteful number, since it uses less digits than its factorization.

12203940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 12203940 is about 3493.4138031444. The cubic root of 12203940 is about 230.2325310564.

The spelling of 12203940 in words is "twelve million, two hundred three thousand, nine hundred forty".