14640238 has 4 divisors (see below), whose sum is σ = 21960360. Its totient is φ = 7320118.

The previous prime is 14640229. The next prime is 14640251. The reversal of 14640238 is 83204641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83204641 = 13 ⋅6400357.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3660058 + ... + 3660061.

It is an arithmetic number, because the mean of its divisors is an integer number (5490090).

Almost surely, 2^14640238 is an apocalyptic number.

14640238 is a deficient number, since it is larger than the sum of its proper divisors (7320122).

14640238 is an equidigital number, since it uses as much as digits as its factorization.

14640238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7320121.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 14640238 is about 3826.2563949636. The cubic root of 14640238 is about 244.6335657797.

Adding to 14640238 its reverse (83204641), we get a palindrome (97844879).

It can be divided in two parts, 14640 and 238, that added together give a triangular number (14878 = T₁₇₂).

The spelling of 14640238 in words is "fourteen million, six hundred forty thousand, two hundred thirty-eight".