63317728 has 48 divisors (see below), whose sum is σ = 132088320. Its totient is φ = 29794176.

The previous prime is 63317719. The next prime is 63317753. The reversal of 63317728 is 82771336.

It is a congruent number.

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, 135351 + ... + 135817.

It is an arithmetic number, because the mean of its divisors is an integer number (2751840).

Almost surely, 2^63317728 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 63317728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66044160).

63317728 is an abundant number, since it is smaller than the sum of its proper divisors (68770592).

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

63317728 is a wasteful number, since it uses less digits than its factorization.

63317728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719 (or 711 counting only the distinct ones).

The product of its digits is 42336, while the sum is 37.

The square root of 63317728 is about 7957.2437439103. The cubic root of 63317728 is about 398.5735189266.

The spelling of 63317728 in words is "sixty-three million, three hundred seventeen thousand, seven hundred twenty-eight".