12793780 has 12 divisors (see below), whose sum is σ = 26866980. Its totient is φ = 5117504.

The previous prime is 12793757. The next prime is 12793801. The reversal of 12793780 is 8739721.

It can be written as a sum of positive squares in 2 ways, for example, as 5253264 + 7540516 = 2292^2 + 2746^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319825 + ... + 319864.

It is an arithmetic number, because the mean of its divisors is an integer number (2238915).

Almost surely, 2^12793780 is an apocalyptic number.

12793780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12793780 is an abundant number, since it is smaller than the sum of its proper divisors (14073200).

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

12793780 is a wasteful number, since it uses less digits than its factorization.

12793780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639698 (or 639696 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 12793780 is about 3576.8393869448. The cubic root of 12793780 is about 233.8835225214.

The spelling of 12793780 in words is "twelve million, seven hundred ninety-three thousand, seven hundred eighty".