12342780 has 120 divisors (see below), whose sum is σ = 40859280. Its totient is φ = 3110400.

The previous prime is 12342773. The next prime is 12342791. The reversal of 12342780 is 8724321.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 30580 + ... + 30980.

It is an arithmetic number, because the mean of its divisors is an integer number (340494).

Almost surely, 2^12342780 is an apocalyptic number.

12342780 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 12342780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20429640).

12342780 is an abundant number, since it is smaller than the sum of its proper divisors (28516500).

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

12342780 is a wasteful number, since it uses less digits than its factorization.

12342780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 12342780 is about 3513.2292837217. The cubic root of 12342780 is about 231.1023328013.

The spelling of 12342780 in words is "twelve million, three hundred forty-two thousand, seven hundred eighty".