12447864 has 192 divisors, whose sum is σ = 42163200. Its totient is φ = 3369600.

The previous prime is 12447847. The next prime is 12447871. The reversal of 12447864 is 46874421.

12447864 is a `hidden beast` number, since 124 + 478 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 401529 + ... + 401559.

It is an arithmetic number, because the mean of its divisors is an integer number (219600).

Almost surely, 2^12447864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12447864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21081600).

12447864 is an abundant number, since it is smaller than the sum of its proper divisors (29715336).

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

12447864 is a wasteful number, since it uses less digits than its factorization.

12447864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 60 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 12447864 is about 3528.1530579044. The cubic root of 12447864 is about 231.7563335478.

The spelling of 12447864 in words is "twelve million, four hundred forty-seven thousand, eight hundred sixty-four".