63688478 has 32 divisors (see below), whose sum is σ = 112416768. Its totient is φ = 26496000.

The previous prime is 63688441. The next prime is 63688483. The reversal of 63688478 is 87488636.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99038 + ... + 99678.

It is an arithmetic number, because the mean of its divisors is an integer number (3513024).

Almost surely, 2^63688478 is an apocalyptic number.

63688478 is a deficient number, since it is larger than the sum of its proper divisors (48728290).

63688478 is a wasteful number, since it uses less digits than its factorization.

63688478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848.

The product of its digits is 1548288, while the sum is 50.

The square root of 63688478 is about 7980.5061243006. The cubic root of 63688478 is about 399.3499399605.

The spelling of 63688478 in words is "sixty-three million, six hundred eighty-eight thousand, four hundred seventy-eight".