13387438 has 8 divisors (see below), whose sum is σ = 21138120. Its totient is φ = 6341400.

The previous prime is 13387427. The next prime is 13387447. The reversal of 13387438 is 83478331.

13387438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 13387397 and 13387406.

It is a congruent number.

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, 176113 + ... + 176188.

It is an arithmetic number, because the mean of its divisors is an integer number (2642265).

Almost surely, 2^13387438 is an apocalyptic number.

13387438 is a deficient number, since it is larger than the sum of its proper divisors (7750682).

13387438 is a wasteful number, since it uses less digits than its factorization.

13387438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352322.

The product of its digits is 48384, while the sum is 37.

The square root of 13387438 is about 3658.8848027780. The cubic root of 13387438 is about 237.4465283130.

It can be divided in two parts, 133 and 87438, that added together give a triangular number (87571 = T₄₁₈).

The spelling of 13387438 in words is "thirteen million, three hundred eighty-seven thousand, four hundred thirty-eight".