12238420 has 12 divisors (see below), whose sum is σ = 25700724. Its totient is φ = 4895360.

The previous prime is 12238417. The next prime is 12238423. The reversal of 12238420 is 2483221.

It is an interprime number because it is at equal distance from previous prime (12238417) and next prime (12238423).

It can be written as a sum of positive squares in 2 ways, for example, as 5827396 + 6411024 = 2414^2 + 2532^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12238391 and 12238400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12238423) 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, 305941 + ... + 305980.

It is an arithmetic number, because the mean of its divisors is an integer number (2141727).

Almost surely, 2^12238420 is an apocalyptic number.

12238420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12238420 is an abundant number, since it is smaller than the sum of its proper divisors (13462304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12238420 is a wasteful number, since it uses less digits than its factorization.

12238420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611930 (or 611928 counting only the distinct ones).

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

The square root of 12238420 is about 3498.3453231492. The cubic root of 12238420 is about 230.4491538083.

The spelling of 12238420 in words is "twelve million, two hundred thirty-eight thousand, four hundred twenty".