12238778 has 8 divisors (see below), whose sum is σ = 18475572. Its totient is φ = 6080256.

The previous prime is 12238771. The next prime is 12238799. The reversal of 12238778 is 87783221.

It can be written as a sum of positive squares in 2 ways, for example, as 10608049 + 1630729 = 3257^2 + 1277^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12238771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19175 + ... + 19802.

Almost surely, 2^12238778 is an apocalyptic number.

12238778 is a deficient number, since it is larger than the sum of its proper divisors (6236794).

12238778 is a wasteful number, since it uses less digits than its factorization.

12238778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39136.

The product of its digits is 37632, while the sum is 38.

The square root of 12238778 is about 3498.3964898222. The cubic root of 12238778 is about 230.4514008302.

It can be divided in two parts, 1223 and 8778, that added together give a palindrome (10001).

The spelling of 12238778 in words is "twelve million, two hundred thirty-eight thousand, seven hundred seventy-eight".