1443240020 has 24 divisors (see below), whose sum is σ = 3064861800. Its totient is φ = 570808832.

The previous prime is 1443239989. The next prime is 1443240023. The reversal of 1443240020 is 200423441.

It can be written as a sum of positive squares in 4 ways, for example, as 63266116 + 1379973904 = 7954^2 + 37148^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1443239974 and 1443240001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1443240023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403625 + ... + 407184.

It is an arithmetic number, because the mean of its divisors is an integer number (127702575).

Almost surely, 2^1443240020 is an apocalyptic number.

1443240020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1443240020 is an abundant number, since it is smaller than the sum of its proper divisors (1621621780).

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

1443240020 is a wasteful number, since it uses less digits than its factorization.

1443240020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810907 (or 810905 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1443240020 is about 37989.9989470913. The cubic root of 1443240020 is about 1130.0895378969.

Adding to 1443240020 its reverse (200423441), we get a palindrome (1643663461).

The spelling of 1443240020 in words is "one billion, four hundred forty-three million, two hundred forty thousand, twenty".