12203840 has 56 divisors (see below), whose sum is σ = 31711392. Its totient is φ = 4436480.

The previous prime is 12203839. The next prime is 12203881. The reversal of 12203840 is 4830221.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1787 + ... + 5253.

Almost surely, 2^12203840 is an apocalyptic number.

12203840 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 12203840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15855696).

12203840 is an abundant number, since it is smaller than the sum of its proper divisors (19507552).

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

12203840 is a wasteful number, since it uses less digits than its factorization.

12203840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3495 (or 3485 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 12203840 is about 3493.3994904677. The cubic root of 12203840 is about 230.2319022071.

The spelling of 12203840 in words is "twelve million, two hundred three thousand, eight hundred forty".