12219840 has 84 divisors (see below), whose sum is σ = 42041064. Its totient is φ = 3257856.

The previous prime is 12219829. The next prime is 12219871. The reversal of 12219840 is 4891221.

12219840 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 759 + ... + 5001.

Almost surely, 2^12219840 is an apocalyptic number.

12219840 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 12219840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21020532).

12219840 is an abundant number, since it is smaller than the sum of its proper divisors (29821224).

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

12219840 is a wasteful number, since it uses less digits than its factorization.

12219840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4266 (or 4253 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 12219840 is about 3495.6887733321. The cubic root of 12219840 is about 230.3324744245.

The spelling of 12219840 in words is "twelve million, two hundred nineteen thousand, eight hundred forty".