12238428 has 48 divisors (see below), whose sum is σ = 29804544. Its totient is φ = 3904320.

The previous prime is 12238427. The next prime is 12238439. The reversal of 12238428 is 82483221.

It is a super-2 number, since 2×12238428² = 299558239822368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12238395 and 12238404.

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 15 ways as a sum of consecutive naturals, for example, 62026 + ... + 62222.

It is an arithmetic number, because the mean of its divisors is an integer number (620928).

Almost surely, 2^12238428 is an apocalyptic number.

It is an amenable number.

12238428 is an abundant number, since it is smaller than the sum of its proper divisors (17566116).

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

12238428 is a wasteful number, since it uses less digits than its factorization.

12238428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 400 counting only the distinct ones).

The product of its digits is 6144, while the sum is 30.

The square root of 12238428 is about 3498.3464665467. The cubic root of 12238428 is about 230.4492040216.

The spelling of 12238428 in words is "twelve million, two hundred thirty-eight thousand, four hundred twenty-eight".