12938320 has 20 divisors (see below), whose sum is σ = 30081780. Its totient is φ = 5175296.

The previous prime is 12938293. The next prime is 12938323. The reversal of 12938320 is 2383921.

It can be written as a sum of positive squares in 2 ways, for example, as 6031936 + 6906384 = 2456^2 + 2628^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12938323) 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, 80785 + ... + 80944.

It is an arithmetic number, because the mean of its divisors is an integer number (1504089).

Almost surely, 2^12938320 is an apocalyptic number.

12938320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12938320 is an abundant number, since it is smaller than the sum of its proper divisors (17143460).

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

12938320 is a wasteful number, since it uses less digits than its factorization.

12938320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161742 (or 161736 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 12938320 is about 3596.9876285581. The cubic root of 12938320 is about 234.7610064616.

The spelling of 12938320 in words is "twelve million, nine hundred thirty-eight thousand, three hundred twenty".