12804780 has 48 divisors (see below), whose sum is σ = 36225504. Its totient is φ = 3379200.

The previous prime is 12804773. The next prime is 12804787. The reversal of 12804780 is 8740821.

It is an interprime number because it is at equal distance from previous prime (12804773) and next prime (12804787).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12804787) 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 15 ways as a sum of consecutive naturals, for example, 5004 + ... + 7116.

It is an arithmetic number, because the mean of its divisors is an integer number (754698).

Almost surely, 2^12804780 is an apocalyptic number.

12804780 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 12804780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18112752).

12804780 is an abundant number, since it is smaller than the sum of its proper divisors (23420724).

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

12804780 is a wasteful number, since it uses less digits than its factorization.

12804780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226 (or 2224 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 12804780 is about 3578.3767269532. The cubic root of 12804780 is about 233.9505337765.

The spelling of 12804780 in words is "twelve million, eight hundred four thousand, seven hundred eighty".