441819381 has 4 divisors (see below), whose sum is σ = 589092512. Its totient is φ = 294546252.

The previous prime is 441819353. The next prime is 441819421. The reversal of 441819381 is 183918144.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 441819381 - 2¹³ = 441811189 is a prime.

It is a super-2 number, since 2×441819381² = 390408730854446322, which contains 22 as substring.

It is the 21020-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441819311) by changing a digit.

It is a nontrivial repunit in base 21019.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73636561 + ... + 73636566.

It is an arithmetic number, because the mean of its divisors is an integer number (147273128).

Almost surely, 2^441819381 is an apocalyptic number.

It is an amenable number.

441819381 is a deficient number, since it is larger than the sum of its proper divisors (147273131).

441819381 is a wasteful number, since it uses less digits than its factorization.

441819381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147273130.

The product of its digits is 27648, while the sum is 39.

The square root of 441819381 is about 21019.5000178406. The cubic root of 441819381 is about 761.6373868012.

The spelling of 441819381 in words is "four hundred forty-one million, eight hundred nineteen thousand, three hundred eighty-one".