12738740 has 48 divisors (see below), whose sum is σ = 32188800. Its totient is φ = 4136832.

The previous prime is 12738727. The next prime is 12738779. The reversal of 12738740 is 4783721.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12738697 and 12738706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266 + ... + 5054.

It is an arithmetic number, because the mean of its divisors is an integer number (670600).

Almost surely, 2^12738740 is an apocalyptic number.

12738740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12738740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16094400).

12738740 is an abundant number, since it is smaller than the sum of its proper divisors (19450060).

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

12738740 is a wasteful number, since it uses less digits than its factorization.

12738740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4824 (or 4822 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 12738740 is about 3569.1371506290. The cubic root of 12738740 is about 233.5476443701.

The spelling of 12738740 in words is "twelve million, seven hundred thirty-eight thousand, seven hundred forty".