63947680 has 48 divisors (see below), whose sum is σ = 153947304. Its totient is φ = 25093120.

The previous prime is 63947669. The next prime is 63947701. The reversal of 63947680 is 8674936.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 45319824 + 18627856 = 6732^2 + 4316^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4710 + ... + 12250.

Almost surely, 2^63947680 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 63947680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76973652).

63947680 is an abundant number, since it is smaller than the sum of its proper divisors (89999624).

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

63947680 is a wasteful number, since it uses less digits than its factorization.

63947680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7609 (or 7601 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 63947680 is about 7996.7293314204. The cubic root of 63947680 is about 399.8909702840.

The spelling of 63947680 in words is "sixty-three million, nine hundred forty-seven thousand, six hundred eighty".