12842478 has 48 divisors (see below), whose sum is σ = 31193136. Its totient is φ = 3784320.

The previous prime is 12842437. The next prime is 12842491. The reversal of 12842478 is 87424821.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6450 + ... + 8202.

It is an arithmetic number, because the mean of its divisors is an integer number (649857).

Almost surely, 2^12842478 is an apocalyptic number.

12842478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12842478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15596568).

12842478 is an abundant number, since it is smaller than the sum of its proper divisors (18350658).

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

12842478 is a wasteful number, since it uses less digits than its factorization.

12842478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809 (or 1806 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 12842478 is about 3583.6403279347. The cubic root of 12842478 is about 234.1798967265.

The spelling of 12842478 in words is "twelve million, eight hundred forty-two thousand, four hundred seventy-eight".