4538638 has 16 divisors (see below), whose sum is σ = 7373520. Its totient is φ = 2082816.

The previous prime is 4538627. The next prime is 4538641. The reversal of 4538638 is 8368354.

It is a junction number, because it is equal to n+sod(n) for n = 4538597 and 4538606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5518 + ... + 6286.

It is an arithmetic number, because the mean of its divisors is an integer number (460845).

Almost surely, 2^4538638 is an apocalyptic number.

4538638 is a deficient number, since it is larger than the sum of its proper divisors (2834882).

4538638 is a wasteful number, since it uses less digits than its factorization.

4538638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011.

The product of its digits is 69120, while the sum is 37.

The square root of 4538638 is about 2130.4079421557. The cubic root of 4538638 is about 165.5675344962.

It can be divided in two parts, 45 and 38638, that added together give a palindrome (38683).

The spelling of 4538638 in words is "four million, five hundred thirty-eight thousand, six hundred thirty-eight".