63971776 has 56 divisors (see below), whose sum is σ = 140177520. Its totient is φ = 28723200.

The previous prime is 63971771. The next prime is 63971783. The reversal of 63971776 is 67717936.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63971771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62146 + ... + 63166.

It is an arithmetic number, because the mean of its divisors is an integer number (2503170).

Almost surely, 2^63971776 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 63971776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70088760).

63971776 is an abundant number, since it is smaller than the sum of its proper divisors (76205744).

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

63971776 is a wasteful number, since it uses less digits than its factorization.

63971776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133 (or 1123 counting only the distinct ones).

The product of its digits is 333396, while the sum is 46.

The square root of 63971776 is about 7998.2358054761. The cubic root of 63971776 is about 399.9411913543.

The spelling of 63971776 in words is "sixty-three million, nine hundred seventy-one thousand, seven hundred seventy-six".