12847720 has 16 divisors (see below), whose sum is σ = 28907460. Its totient is φ = 5139072.

The previous prime is 12847717. The next prime is 12847727. The reversal of 12847720 is 2774821.

It can be written as a sum of positive squares in 2 ways, for example, as 12659364 + 188356 = 3558^2 + 434^2 .

It is not an unprimeable number, because it can be changed into a prime (12847727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160557 + ... + 160636.

Almost surely, 2^12847720 is an apocalyptic number.

12847720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12847720 is an abundant number, since it is smaller than the sum of its proper divisors (16059740).

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

12847720 is a wasteful number, since it uses less digits than its factorization.

12847720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321204 (or 321200 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 12847720 is about 3584.3716325180. The cubic root of 12847720 is about 234.2117546497.

The spelling of 12847720 in words is "twelve million, eight hundred forty-seven thousand, seven hundred twenty".