44821 has 8 divisors (see below), whose sum is σ = 54080. Its totient is φ = 36288.

The previous prime is 44819. The next prime is 44839. The reversal of 44821 is 12844.

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

It is not a de Polignac number, because 44821 - 2¹ = 44819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44851) 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, 36 + ... + 301.

It is an arithmetic number, because the mean of its divisors is an integer number (6760).

2⁴⁴⁸²¹ is an apocalyptic number.

It is an amenable number.

44821 is a deficient number, since it is larger than the sum of its proper divisors (9259).

44821 is a wasteful number, since it uses less digits than its factorization.

44821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363.

The product of its digits is 256, while the sum is 19.

The square root of 44821 is about 211.7097069102. The cubic root of 44821 is about 35.5217086028.

The spelling of 44821 in words is "forty-four thousand, eight hundred twenty-one".