1444764340 has 24 divisors (see below), whose sum is σ = 3138627240. Its totient is φ = 557977728.

The previous prime is 1444764287. The next prime is 1444764341. The reversal of 1444764340 is 434674441.

It can be written as a sum of positive squares in 4 ways, for example, as 104325796 + 1340438544 = 10214^2 + 36612^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1444764340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444764341) 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, 1244907 + ... + 1246066.

It is an arithmetic number, because the mean of its divisors is an integer number (130776135).

Almost surely, 2^1444764340 is an apocalyptic number.

1444764340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1444764340 is an abundant number, since it is smaller than the sum of its proper divisors (1693862900).

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

1444764340 is a wasteful number, since it uses less digits than its factorization.

1444764340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491011 (or 2491009 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 37.

The square root of 1444764340 is about 38010.0557747552. The cubic root of 1444764340 is about 1130.4872569068.

It can be divided in two parts, 14447 and 64340, that added together give a palindrome (78787).

The spelling of 1444764340 in words is "one billion, four hundred forty-four million, seven hundred sixty-four thousand, three hundred forty".