420144443 has 12 divisors (see below), whose sum is σ = 456705480. Its totient is φ = 386222592.

The previous prime is 420144437. The next prime is 420144449. The reversal of 420144443 is 344441024.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (420144437) and next prime (420144449).

It is not a de Polignac number, because 420144443 - 2¹⁰ = 420143419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420144449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4478 + ... + 29331.

It is an arithmetic number, because the mean of its divisors is an integer number (38058790).

Almost surely, 2^420144443 is an apocalyptic number.

420144443 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

420144443 is a deficient number, since it is larger than the sum of its proper divisors (36561037).

420144443 is a wasteful number, since it uses less digits than its factorization.

420144443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33886 (or 33869 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 420144443 is about 20497.4252773367. The cubic root of 420144443 is about 748.9730792943.

Adding to 420144443 its reverse (344441024), we get a palindrome (764585467).

The spelling of 420144443 in words is "four hundred twenty million, one hundred forty-four thousand, four hundred forty-three".