12783320 has 64 divisors (see below), whose sum is σ = 33242400. Its totient is φ = 4372480.

The previous prime is 12783319. The next prime is 12783347. The reversal of 12783320 is 2338721.

It is a self number, because there is not a number n which added to its sum of digits gives 12783320.

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, 6626 + ... + 8334.

Almost surely, 2^12783320 is an apocalyptic number.

12783320 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 12783320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16621200).

12783320 is an abundant number, since it is smaller than the sum of its proper divisors (20459080).

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

12783320 is a wasteful number, since it uses less digits than its factorization.

12783320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748 (or 1744 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 12783320 is about 3575.3769032089. The cubic root of 12783320 is about 233.8197652720.

The spelling of 12783320 in words is "twelve million, seven hundred eighty-three thousand, three hundred twenty".