12828780 has 60 divisors (see below), whose sum is σ = 40249440. Its totient is φ = 3420576.

The previous prime is 12828769. The next prime is 12828787. The reversal of 12828780 is 8782821.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-3 number, since 3×12828780³ (a number of 22 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (12828787) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2340 + ... + 5579.

It is an arithmetic number, because the mean of its divisors is an integer number (670824).

Almost surely, 2^12828780 is an apocalyptic number.

12828780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12828780 is an abundant number, since it is smaller than the sum of its proper divisors (27420660).

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

12828780 is a wasteful number, since it uses less digits than its factorization.

12828780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7940 (or 7929 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 12828780 is about 3581.7286329369. The cubic root of 12828780 is about 234.0966070530.

The spelling of 12828780 in words is "twelve million, eight hundred twenty-eight thousand, seven hundred eighty".