63720216 has 256 divisors, whose sum is σ = 223257600. Its totient is φ = 16422912.

The previous prime is 63720197. The next prime is 63720247. The reversal of 63720216 is 61202736.

It is a happy number.

63720216 is a `hidden beast` number, since 637 + 2 + 0 + 21 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 63720216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 951015 + ... + 951081.

It is an arithmetic number, because the mean of its divisors is an integer number (872100).

Almost surely, 2^63720216 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 63720216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111628800).

63720216 is an abundant number, since it is smaller than the sum of its proper divisors (159537384).

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

63720216 is a wasteful number, since it uses less digits than its factorization.

63720216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 63720216 is about 7982.4943470071. The cubic root of 63720216 is about 399.4162652153.

It can be divided in two parts, 63720 and 216, that added together give a palindrome (63936).

The spelling of 63720216 in words is "sixty-three million, seven hundred twenty thousand, two hundred sixteen".