8663424 has 128 divisors (see below), whose sum is σ = 28788480. Its totient is φ = 2242560.

The previous prime is 8663401. The next prime is 8663437. The reversal of 8663424 is 4243668.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29422 + ... + 29714.

It is an arithmetic number, because the mean of its divisors is an integer number (224910).

Almost surely, 2^8663424 is an apocalyptic number.

8663424 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8663424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14394240).

8663424 is an abundant number, since it is smaller than the sum of its proper divisors (20125056).

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

8663424 is a wasteful number, since it uses less digits than its factorization.

8663424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 316 counting only the distinct ones).

The product of its digits is 27648, while the sum is 33.

The square root of 8663424 is about 2943.3694977016. The cubic root of 8663424 is about 205.3823836642.

The spelling of 8663424 in words is "eight million, six hundred sixty-three thousand, four hundred twenty-four".