63998424 has 96 divisors (see below), whose sum is σ = 205470720. Its totient is φ = 18281376.

The previous prime is 63998423. The next prime is 63998437. The reversal of 63998424 is 42489936.

63998424 is a `hidden beast` number, since 639 + 9 + 8 + 4 + 2 + 4 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 63998424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63998423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11257 + ... + 15959.

It is an arithmetic number, because the mean of its divisors is an integer number (2140320).

Almost surely, 2^63998424 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 63998424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102735360).

63998424 is an abundant number, since it is smaller than the sum of its proper divisors (141472296).

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

63998424 is a wasteful number, since it uses less digits than its factorization.

63998424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4731 (or 4715 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 63998424 is about 7999.9014993936. The cubic root of 63998424 is about 399.9967166397.

The spelling of 63998424 in words is "sixty-three million, nine hundred ninety-eight thousand, four hundred twenty-four".