63947776 has 44 divisors (see below), whose sum is σ = 128887308. Its totient is φ = 31711232.

The previous prime is 63947773. The next prime is 63947791. The reversal of 63947776 is 67774936.

It can be written as a sum of positive squares in 2 ways, for example, as 35046400 + 28901376 = 5920^2 + 5376^2 .

It is not an unprimeable number, because it can be changed into a prime (63947771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201570 + ... + 201886.

It is an arithmetic number, because the mean of its divisors is an integer number (2929257).

Almost surely, 2^63947776 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 63947776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64443654).

63947776 is an abundant number, since it is smaller than the sum of its proper divisors (64939532).

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

63947776 is a wasteful number, since it uses less digits than its factorization.

63947776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 516 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 49.

The square root of 63947776 is about 7996.7353338722. The cubic root of 63947776 is about 399.8911703930.

The spelling of 63947776 in words is "sixty-three million, nine hundred forty-seven thousand, seven hundred seventy-six".