420323144 has 32 divisors (see below), whose sum is σ = 809063640. Its totient is φ = 204595200.

The previous prime is 420323143. The next prime is 420323153. The reversal of 420323144 is 441323024.

It can be written as a sum of positive squares in 4 ways, for example, as 304502500 + 115820644 = 17450^2 + 10762^2 .

It is not an unprimeable number, because it can be changed into a prime (420323143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193424 + ... + 195584.

Almost surely, 2^420323144 is an apocalyptic number.

It is an amenable number.

420323144 is a deficient number, since it is larger than the sum of its proper divisors (388740496).

420323144 is a wasteful number, since it uses less digits than its factorization.

420323144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801 (or 2797 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 420323144 is about 20501.7839223810. The cubic root of 420323144 is about 749.0792517223.

Adding to 420323144 its reverse (441323024), we get a palindrome (861646168).

The spelling of 420323144 in words is "four hundred twenty million, three hundred twenty-three thousand, one hundred forty-four".