4398821 has 8 divisors (see below), whose sum is σ = 5076864. Its totient is φ = 3733200.

The previous prime is 4398817. The next prime is 4398829. The reversal of 4398821 is 1288934.

It is a happy number.

4398821 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

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 4398821 - 2² = 4398817 is a prime.

It is a Duffinian number.

4398821 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4398829) 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, 2330 + ... + 3771.

It is an arithmetic number, because the mean of its divisors is an integer number (634608).

Almost surely, 2^4398821 is an apocalyptic number.

It is an amenable number.

4398821 is a deficient number, since it is larger than the sum of its proper divisors (678043).

4398821 is a wasteful number, since it uses less digits than its factorization.

4398821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6211.

The product of its digits is 13824, while the sum is 35.

The square root of 4398821 is about 2097.3366444136. The cubic root of 4398821 is about 163.8496167554.

The spelling of 4398821 in words is "four million, three hundred ninety-eight thousand, eight hundred twenty-one".