13642238 has 8 divisors (see below), whose sum is σ = 21169080. Its totient is φ = 6585880.

The previous prime is 13642231. The next prime is 13642241. The reversal of 13642238 is 83224631.

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

It is a super-2 number, since 2×13642238² = 372221315297288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 13642238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13642231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117548 + ... + 117663.

It is an arithmetic number, because the mean of its divisors is an integer number (2646135).

Almost surely, 2^13642238 is an apocalyptic number.

13642238 is a deficient number, since it is larger than the sum of its proper divisors (7526842).

13642238 is a wasteful number, since it uses less digits than its factorization.

13642238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235242.

The product of its digits is 6912, while the sum is 29.

The square root of 13642238 is about 3693.5400363337. The cubic root of 13642238 is about 238.9434925318.

Adding to 13642238 its reverse (83224631), we get a palindrome (96866869).

The spelling of 13642238 in words is "thirteen million, six hundred forty-two thousand, two hundred thirty-eight".