12647620 has 12 divisors (see below), whose sum is σ = 26560044. Its totient is φ = 5059040.

The previous prime is 12647617. The next prime is 12647627. The reversal of 12647620 is 2674621.

It can be written as a sum of positive squares in 2 ways, for example, as 8868484 + 3779136 = 2978^2 + 1944^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12647627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316171 + ... + 316210.

It is an arithmetic number, because the mean of its divisors is an integer number (2213337).

Almost surely, 2^12647620 is an apocalyptic number.

12647620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12647620 is an abundant number, since it is smaller than the sum of its proper divisors (13912424).

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

12647620 is a wasteful number, since it uses less digits than its factorization.

12647620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632390 (or 632388 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 12647620 is about 3556.3492516906. The cubic root of 12647620 is about 232.9894571786.

The spelling of 12647620 in words is "twelve million, six hundred forty-seven thousand, six hundred twenty".