12390238 has 36 divisors (see below), whose sum is σ = 22695120. Its totient is φ = 5057976.

The previous prime is 12390211. The next prime is 12390251. The reversal of 12390238 is 83209321.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 51723 + ... + 51961.

It is an arithmetic number, because the mean of its divisors is an integer number (630420).

Almost surely, 2^12390238 is an apocalyptic number.

12390238 is a deficient number, since it is larger than the sum of its proper divisors (10304882).

12390238 is a wasteful number, since it uses less digits than its factorization.

12390238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 12390238 is about 3519.9769885611. The cubic root of 12390238 is about 231.3981502098.

Adding to 12390238 its reverse (83209321), we get a palindrome (95599559).

The spelling of 12390238 in words is "twelve million, three hundred ninety thousand, two hundred thirty-eight".