12780780 has 48 divisors (see below), whose sum is σ = 35962080. Its totient is φ = 3391488.

The previous prime is 12780763. The next prime is 12780797. The reversal of 12780780 is 8708721.

It is an interprime number because it is at equal distance from previous prime (12780763) and next prime (12780797).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16236 + ... + 17004.

It is an arithmetic number, because the mean of its divisors is an integer number (749210).

Almost surely, 2^12780780 is an apocalyptic number.

12780780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12780780 is an abundant number, since it is smaller than the sum of its proper divisors (23181300).

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

12780780 is a wasteful number, since it uses less digits than its factorization.

12780780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058 (or 1056 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 12780780 is about 3575.0216782560. The cubic root of 12780780 is about 233.8042778622.

The spelling of 12780780 in words is "twelve million, seven hundred eighty thousand, seven hundred eighty".