63998208 has 144 divisors (see below), whose sum is σ = 194261760. Its totient is φ = 20772864.

The previous prime is 63998203. The next prime is 63998219. The reversal of 63998208 is 80289936.

Added to its reverse (80289936) it gives a square (144288144 = 12012²).

63998208 is a `hidden beast` number, since 639 + 9 + 8 + 2 + 0 + 8 = 666.

63998208 is nontrivially palindromic in base 14.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×63998208² = 8191541254422528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63998203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324766 + ... + 324962.

It is an arithmetic number, because the mean of its divisors is an integer number (1349040).

Almost surely, 2^63998208 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 63998208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97130880).

63998208 is an abundant number, since it is smaller than the sum of its proper divisors (130263552).

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

63998208 is a wasteful number, since it uses less digits than its factorization.

63998208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 63998208 is about 7999.8879992160. The cubic root of 63998208 is about 399.9962666318.

Adding to 63998208 its reverse (80289936), we get a square (144288144 = 12012²).

The spelling of 63998208 in words is "sixty-three million, nine hundred ninety-eight thousand, two hundred eight".