12207840 has 96 divisors (see below), whose sum is σ = 39826080. Its totient is φ = 3139584.

The previous prime is 12207821. The next prime is 12207851. The reversal of 12207840 is 4870221.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12207840.

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 15 ways as a sum of consecutive naturals, for example, 13482 + ... + 14358.

It is an arithmetic number, because the mean of its divisors is an integer number (414855).

Almost surely, 2^12207840 is an apocalyptic number.

12207840 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 12207840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19913040).

12207840 is an abundant number, since it is smaller than the sum of its proper divisors (27618240).

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

12207840 is a wasteful number, since it uses less digits than its factorization.

12207840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 12207840 is about 3493.9719518050. The cubic root of 12207840 is about 230.2570534986.

The spelling of 12207840 in words is "twelve million, two hundred seven thousand, eight hundred forty".