13403938 has 8 divisors (see below), whose sum is σ = 20190060. Its totient is φ = 6673920.

The previous prime is 13403893. The next prime is 13403969. The reversal of 13403938 is 83930431.

It can be written as a sum of positive squares in 2 ways, for example, as 12652249 + 751689 = 3557^2 + 867^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13423 + ... + 14386.

Almost surely, 2^13403938 is an apocalyptic number.

13403938 is a deficient number, since it is larger than the sum of its proper divisors (6786122).

13403938 is a wasteful number, since it uses less digits than its factorization.

13403938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28052.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 13403938 is about 3661.1388938416. The cubic root of 13403938 is about 237.5440391095.

It can be divided in two parts, 13403 and 938, that added together give a palindrome (14341).

The spelling of 13403938 in words is "thirteen million, four hundred three thousand, nine hundred thirty-eight".