4821638 has 8 divisors (see below), whose sum is σ = 7252680. Its totient is φ = 2404080.

The previous prime is 4821637. The next prime is 4821643. The reversal of 4821638 is 8361284.

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

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4821631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2423 + ... + 3938.

It is an arithmetic number, because the mean of its divisors is an integer number (906585).

Almost surely, 2^4821638 is an apocalyptic number.

4821638 is a deficient number, since it is larger than the sum of its proper divisors (2431042).

4821638 is a wasteful number, since it uses less digits than its factorization.

4821638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6742.

The product of its digits is 9216, while the sum is 32.

The square root of 4821638 is about 2195.8228525999. The cubic root of 4821638 is about 168.9396280747.

The spelling of 4821638 in words is "four million, eight hundred twenty-one thousand, six hundred thirty-eight".