12236778 has 32 divisors (see below), whose sum is σ = 27861120. Its totient is φ = 3978720.

The previous prime is 12236767. The next prime is 12236803. The reversal of 12236778 is 87763221.

It is a plaindrome in base 10.

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, 550 + ... + 4977.

It is an arithmetic number, because the mean of its divisors is an integer number (870660).

Almost surely, 2^12236778 is an apocalyptic number.

12236778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12236778 is an abundant number, since it is smaller than the sum of its proper divisors (15624342).

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

12236778 is a wasteful number, since it uses less digits than its factorization.

12236778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5579 (or 5573 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 12236778 is about 3498.1106328989. The cubic root of 12236778 is about 230.4388470739.

Adding to 12236778 its reverse (87763221), we get a palindrome (99999999).

It can be divided in two parts, 1223 and 6778, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 12236778 in words is "twelve million, two hundred thirty-six thousand, seven hundred seventy-eight".