63447916 has 36 divisors (see below), whose sum is σ = 133947408. Its totient is φ = 25756704.

The previous prime is 63447907. The next prime is 63447931. The reversal of 63447916 is 61974436.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6970 + ... + 13246.

Almost surely, 2^63447916 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 63447916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66973704).

63447916 is an abundant number, since it is smaller than the sum of its proper divisors (70499492).

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

63447916 is a wasteful number, since it uses less digits than its factorization.

63447916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6326 (or 6305 counting only the distinct ones).

The product of its digits is 108864, while the sum is 40.

The square root of 63447916 is about 7965.4200140357. The cubic root of 63447916 is about 398.8465018023.

The spelling of 63447916 in words is "sixty-three million, four hundred forty-seven thousand, nine hundred sixteen".