12194478 has 12 divisors (see below), whose sum is σ = 26421408. Its totient is φ = 4064820.

The previous prime is 12194477. The next prime is 12194503. The reversal of 12194478 is 87449121.

12194478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12194473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 338718 + ... + 338753.

It is an arithmetic number, because the mean of its divisors is an integer number (2201784).

Almost surely, 2^12194478 is an apocalyptic number.

12194478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12194478 is an abundant number, since it is smaller than the sum of its proper divisors (14226930).

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

12194478 is a wasteful number, since it uses less digits than its factorization.

12194478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677479 (or 677476 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 12194478 is about 3492.0592778474. The cubic root of 12194478 is about 230.1730141175.

The spelling of 12194478 in words is "twelve million, one hundred ninety-four thousand, four hundred seventy-eight".