4021444444340 has 12 divisors (see below), whose sum is σ = 8445033333156. Its totient is φ = 1608577777728.

The previous prime is 4021444444249. The next prime is 4021444444343. The reversal of 4021444444340 is 434444441204.

It can be written as a sum of positive squares in 2 ways, for example, as 1794538876816 + 2226905567524 = 1339604^2 + 1492282^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4021444444294 and 4021444444303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021444444343) 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, 100536111089 + ... + 100536111128.

It is an arithmetic number, because the mean of its divisors is an integer number (703752777763).

Almost surely, 2^{4021444444340} is an apocalyptic number.

It is an amenable number.

4021444444340 is an abundant number, since it is smaller than the sum of its proper divisors (4423588888816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4021444444340 is a wasteful number, since it uses less digits than its factorization.

4021444444340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201072222226 (or 201072222224 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 38.

Adding to 4021444444340 its reverse (434444441204), we get a palindrome (4455888885544).

It can be divided in two parts, 402144 and 4444340, that added together give a palindrome (4846484).

The spelling of 4021444444340 in words is "four trillion, twenty-one billion, four hundred forty-four million, four hundred forty-four thousand, three hundred forty".