12447838 has 8 divisors (see below), whose sum is σ = 20108088. Its totient is φ = 5745144.

The previous prime is 12447823. The next prime is 12447847. The reversal of 12447838 is 83874421.

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

It is a junction number, because it is equal to n+sod(n) for n = 12447797 and 12447806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239356 + ... + 239407.

It is an arithmetic number, because the mean of its divisors is an integer number (2513511).

Almost surely, 2^12447838 is an apocalyptic number.

12447838 is a deficient number, since it is larger than the sum of its proper divisors (7660250).

12447838 is a wasteful number, since it uses less digits than its factorization.

12447838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478778.

The product of its digits is 43008, while the sum is 37.

The square root of 12447838 is about 3528.1493732550. The cubic root of 12447838 is about 231.7561721902.

The spelling of 12447838 in words is "twelve million, four hundred forty-seven thousand, eight hundred thirty-eight".