13438340 has 12 divisors (see below), whose sum is σ = 28220556. Its totient is φ = 5375328.

The previous prime is 13438333. The next prime is 13438343. The reversal of 13438340 is 4383431.

It can be written as a sum of positive squares in 2 ways, for example, as 10291264 + 3147076 = 3208^2 + 1774^2 .

It is not an unprimeable number, because it can be changed into a prime (13438343) 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, 335939 + ... + 335978.

It is an arithmetic number, because the mean of its divisors is an integer number (2351713).

Almost surely, 2^13438340 is an apocalyptic number.

13438340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13438340 is an abundant number, since it is smaller than the sum of its proper divisors (14782216).

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

13438340 is a wasteful number, since it uses less digits than its factorization.

13438340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671926 (or 671924 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 13438340 is about 3665.8341479123. The cubic root of 13438340 is about 237.7470891059.

The spelling of 13438340 in words is "thirteen million, four hundred thirty-eight thousand, three hundred forty".