63423638 has 32 divisors (see below), whose sum is σ = 102060000. Its totient is φ = 29505280.

The previous prime is 63423637. The next prime is 63423697. The reversal of 63423638 is 83632436.

It is a junction number, because it is equal to n+sod(n) for n = 63423598 and 63423607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63423631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354233 + ... + 354411.

It is an arithmetic number, because the mean of its divisors is an integer number (3189375).

Almost surely, 2^63423638 is an apocalyptic number.

63423638 is a deficient number, since it is larger than the sum of its proper divisors (38636362).

63423638 is a wasteful number, since it uses less digits than its factorization.

63423638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400.

The product of its digits is 62208, while the sum is 35.

The square root of 63423638 is about 7963.8959058993. The cubic root of 63423638 is about 398.7956231640.

The spelling of 63423638 in words is "sixty-three million, four hundred twenty-three thousand, six hundred thirty-eight".