420043444 has 12 divisors (see below), whose sum is σ = 748945764. Its totient is φ = 206058944.

The previous prime is 420043441. The next prime is 420043447. The reversal of 420043444 is 444340024.

It is an interprime number because it is at equal distance from previous prime (420043441) and next prime (420043447).

It can be written as a sum of positive squares in 2 ways, for example, as 201299344 + 218744100 = 14188^2 + 14790^2 .

It is a super-2 number, since 2×420043444² = 352872989694762272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420043441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 990457 + ... + 990880.

It is an arithmetic number, because the mean of its divisors is an integer number (62412147).

Almost surely, 2^420043444 is an apocalyptic number.

It is an amenable number.

420043444 is a deficient number, since it is larger than the sum of its proper divisors (328902320).

420043444 is a wasteful number, since it uses less digits than its factorization.

420043444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981394 (or 1981392 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 25.

The square root of 420043444 is about 20494.9614295807. The cubic root of 420043444 is about 748.9130589881.

Adding to 420043444 its reverse (444340024), we get a palindrome (864383468).

The spelling of 420043444 in words is "four hundred twenty million, forty-three thousand, four hundred forty-four".