4638221 has 8 divisors (see below), whose sum is σ = 5337600. Its totient is φ = 3948048.

The previous prime is 4638211. The next prime is 4638239. The reversal of 4638221 is 1228364.

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

It is a cyclic number.

It is not a de Polignac number, because 4638221 - 2²² = 443917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4638211) 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, 1181 + ... + 3266.

It is an arithmetic number, because the mean of its divisors is an integer number (667200).

Almost surely, 2^4638221 is an apocalyptic number.

It is an amenable number.

4638221 is a deficient number, since it is larger than the sum of its proper divisors (699379).

4638221 is a wasteful number, since it uses less digits than its factorization.

4638221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4603.

The product of its digits is 2304, while the sum is 26.

The square root of 4638221 is about 2153.6529432571. The cubic root of 4638221 is about 166.7696994035.

The spelling of 4638221 in words is "four million, six hundred thirty-eight thousand, two hundred twenty-one".