13780238 has 8 divisors (see below), whose sum is σ = 20875320. Its totient is φ = 6821800.

The previous prime is 13780231. The next prime is 13780279. The reversal of 13780238 is 83208731.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13780231) 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, 33908 + ... + 34311.

It is an arithmetic number, because the mean of its divisors is an integer number (2609415).

Almost surely, 2^13780238 is an apocalyptic number.

13780238 is a deficient number, since it is larger than the sum of its proper divisors (7095082).

13780238 is a wasteful number, since it uses less digits than its factorization.

13780238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68322.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 13780238 is about 3712.1742954770. The cubic root of 13780238 is about 239.7464799778.

Adding to 13780238 its reverse (83208731), we get a palindrome (96988969).

The spelling of 13780238 in words is "thirteen million, seven hundred eighty thousand, two hundred thirty-eight".