12338778 has 8 divisors (see below), whose sum is σ = 24677568. Its totient is φ = 4112924.

The previous prime is 12338747. The next prime is 12338779. The reversal of 12338778 is 87783321.

12338778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

12338778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (12338779) 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, 1028226 + ... + 1028237.

It is an arithmetic number, because the mean of its divisors is an integer number (3084696).

Almost surely, 2^12338778 is an apocalyptic number.

12338778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12338778 is a wasteful number, since it uses less digits than its factorization.

12338778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056468.

The product of its digits is 56448, while the sum is 39.

The square root of 12338778 is about 3512.6596760859. The cubic root of 12338778 is about 231.0773527046.

It can be divided in two parts, 1233 and 8778, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 12338778 in words is "twelve million, three hundred thirty-eight thousand, seven hundred seventy-eight".