420444441 has 6 divisors (see below), whose sum is σ = 607308650. Its totient is φ = 280296288.

The previous prime is 420444433. The next prime is 420444457. The reversal of 420444441 is 144444024.

It can be written as a sum of positive squares in only one way, i.e., 419225625 + 1218816 = 20475^2 + 1104^2 .

It is not a de Polignac number, because 420444441 - 2³ = 420444433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420444491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23358016 + ... + 23358033.

Almost surely, 2^420444441 is an apocalyptic number.

It is an amenable number.

420444441 is a deficient number, since it is larger than the sum of its proper divisors (186864209).

420444441 is a wasteful number, since it uses less digits than its factorization.

420444441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46716055 (or 46716052 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

The square root of 420444441 is about 20504.7419149815. The cubic root of 420444441 is about 749.1513013096.

Adding to 420444441 its reverse (144444024), we get a palindrome (564888465).

The spelling of 420444441 in words is "four hundred twenty million, four hundred forty-four thousand, four hundred forty-one".