63728663 has 8 divisors (see below), whose sum is σ = 65196480. Its totient is φ = 62265600.

The previous prime is 63728659. The next prime is 63728669. The reversal of 63728663 is 36682736.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63728663 - 2² = 63728659 is a prime.

It is a super-2 number, since 2×63728663² = 8122684975535138, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63728663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63728669) 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, 52463 + ... + 53663.

It is an arithmetic number, because the mean of its divisors is an integer number (8149560).

Almost surely, 2^63728663 is an apocalyptic number.

63728663 is a deficient number, since it is larger than the sum of its proper divisors (1467817).

63728663 is a wasteful number, since it uses less digits than its factorization.

63728663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2377.

The product of its digits is 217728, while the sum is 41.

The square root of 63728663 is about 7983.0234247433. The cubic root of 63728663 is about 399.4339138274.

The spelling of 63728663 in words is "sixty-three million, seven hundred twenty-eight thousand, six hundred sixty-three".