1443440020 has 24 divisors (see below), whose sum is σ = 3306790368. Its totient is φ = 524887200.

The previous prime is 1443439999. The next prime is 1443440087. The reversal of 1443440020 is 200443441.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1443439973 and 1443440000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3280326 + ... + 3280765.

It is an arithmetic number, because the mean of its divisors is an integer number (137782932).

Almost surely, 2^1443440020 is an apocalyptic number.

1443440020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1443440020 is an abundant number, since it is smaller than the sum of its proper divisors (1863350348).

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

1443440020 is a wasteful number, since it uses less digits than its factorization.

1443440020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6561111 (or 6561109 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1443440020 is about 37992.6311276279. The cubic root of 1443440020 is about 1130.1417369917.

Adding to 1443440020 its reverse (200443441), we get a palindrome (1643883461).

The spelling of 1443440020 in words is "one billion, four hundred forty-three million, four hundred forty thousand, twenty".