638463 has 8 divisors (see below), whose sum is σ = 972928. Its totient is φ = 364824.

The previous prime is 638459. The next prime is 638467. The reversal of 638463 is 364836.

It is an interprime number because it is at equal distance from previous prime (638459) and next prime (638467).

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

It is not a de Polignac number, because 638463 - 2² = 638459 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 8 and base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 638463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638467) 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, 15181 + ... + 15222.

It is an arithmetic number, because the mean of its divisors is an integer number (121616).

2⁶³⁸⁴⁶³ is an apocalyptic number.

638463 is a deficient number, since it is larger than the sum of its proper divisors (334465).

638463 is a wasteful number, since it uses less digits than its factorization.

638463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30413.

The product of its digits is 10368, while the sum is 30.

The square root of 638463 is about 799.0387975562. The cubic root of 638463 is about 86.1083455080.

The spelling of 638463 in words is "six hundred thirty-eight thousand, four hundred sixty-three".