12199840 has 24 divisors (see below), whose sum is σ = 28822500. Its totient is φ = 4879872.

The previous prime is 12199813. The next prime is 12199841. The reversal of 12199840 is 4899121.

It can be written as a sum of positive squares in 2 ways, for example, as 12194064 + 5776 = 3492^2 + 76^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12199796 and 12199805.

It is not an unprimeable number, because it can be changed into a prime (12199841) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 37965 + ... + 38284.

Almost surely, 2^12199840 is an apocalyptic number.

12199840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12199840 is an abundant number, since it is smaller than the sum of its proper divisors (16622660).

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

12199840 is an equidigital number, since it uses as much as digits as its factorization.

12199840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76264 (or 76256 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 12199840 is about 3492.8269353061. The cubic root of 12199840 is about 230.2067454192.

The spelling of 12199840 in words is "twelve million, one hundred ninety-nine thousand, eight hundred forty".