12402238 has 8 divisors (see below), whose sum is σ = 18774360. Its totient is φ = 6144120.

The previous prime is 12402233. The next prime is 12402241. The reversal of 12402238 is 83220421.

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 (12402233) 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, 28228 + ... + 28663.

It is an arithmetic number, because the mean of its divisors is an integer number (2346795).

Almost surely, 2^12402238 is an apocalyptic number.

12402238 is a deficient number, since it is larger than the sum of its proper divisors (6372122).

12402238 is a wasteful number, since it uses less digits than its factorization.

12402238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57002.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 12402238 is about 3521.6811326411. The cubic root of 12402238 is about 231.4728294813.

Adding to 12402238 its reverse (83220421), we get a palindrome (95622659).

The spelling of 12402238 in words is "twelve million, four hundred two thousand, two hundred thirty-eight".