12201840 has 200 divisors, whose sum is σ = 48612960. Its totient is φ = 2778624.

The previous prime is 12201829. The next prime is 12201859. The reversal of 12201840 is 4810221.

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

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 45226 + ... + 45494.

Almost surely, 2^12201840 is an apocalyptic number.

12201840 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 12201840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24306480).

12201840 is an abundant number, since it is smaller than the sum of its proper divisors (36411120).

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

12201840 is a wasteful number, since it uses less digits than its factorization.

12201840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301 (or 286 counting only the distinct ones).

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

The square root of 12201840 is about 3493.1132246178. The cubic root of 12201840 is about 230.2193245004.

It can be divided in two parts, 12201 and 840, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 12201840 in words is "twelve million, two hundred one thousand, eight hundred forty".