1443440340 has 108 divisors (see below), whose sum is σ = 4483661364. Its totient is φ = 375879168.

The previous prime is 1443440333. The next prime is 1443440347. The reversal of 1443440340 is 430443441.

It is an interprime number because it is at equal distance from previous prime (1443440333) and next prime (1443440347).

It can be written as a sum of positive squares in 2 ways, for example, as 194100624 + 1249339716 = 13932^2 + 35346^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1443440347) 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 35 ways as a sum of consecutive naturals, for example, 330652 + ... + 334988.

It is an arithmetic number, because the mean of its divisors is an integer number (41515383).

Almost surely, 2^1443440340 is an apocalyptic number.

1443440340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1443440340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2241830682).

1443440340 is an abundant number, since it is smaller than the sum of its proper divisors (3040221024).

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

1443440340 is a wasteful number, since it uses less digits than its factorization.

1443440340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4438 (or 4390 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 1443440340 is about 37992.6353389706. The cubic root of 1443440340 is about 1130.1418205064.

Adding to 1443440340 its reverse (430443441), we get a palindrome (1873883781).

The spelling of 1443440340 in words is "one billion, four hundred forty-three million, four hundred forty thousand, three hundred forty".