12428194 has 8 divisors (see below), whose sum is σ = 18662940. Its totient is φ = 6207216.

The previous prime is 12428191. The next prime is 12428197. The reversal of 12428194 is 49182421.

It is an interprime number because it is at equal distance from previous prime (12428191) and next prime (12428197).

It can be written as a sum of positive squares in 2 ways, for example, as 12341169 + 87025 = 3513^2 + 295^2 .

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

It is a super-2 number, since 2×12428194² = 308920012203272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12428191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 769 + ... + 5044.

Almost surely, 2^12428194 is an apocalyptic number.

12428194 is a deficient number, since it is larger than the sum of its proper divisors (6234746).

12428194 is a wasteful number, since it uses less digits than its factorization.

12428194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6884.

The product of its digits is 4608, while the sum is 31.

The square root of 12428194 is about 3525.3643783303. The cubic root of 12428194 is about 231.6341961174.

The spelling of 12428194 in words is "twelve million, four hundred twenty-eight thousand, one hundred ninety-four".