12783238 has 32 divisors (see below), whose sum is σ = 22024800. Its totient is φ = 5515776.

The previous prime is 12783223. The next prime is 12783283. The reversal of 12783238 is 83238721.

It is a super-2 number, since 2×12783238² = 326822347529288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55708 + ... + 55936.

It is an arithmetic number, because the mean of its divisors is an integer number (688275).

Almost surely, 2^12783238 is an apocalyptic number.

12783238 is a deficient number, since it is larger than the sum of its proper divisors (9241562).

12783238 is a wasteful number, since it uses less digits than its factorization.

12783238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376.

The product of its digits is 16128, while the sum is 34.

The square root of 12783238 is about 3575.3654358681. The cubic root of 12783238 is about 233.8192653168.

It can be divided in two parts, 127832 and 38, that multiplied together give a square (4857616 = 2204²).

The spelling of 12783238 in words is "twelve million, seven hundred eighty-three thousand, two hundred thirty-eight".