1444775320 has 16 divisors (see below), whose sum is σ = 3250744560. Its totient is φ = 577910112.

The previous prime is 1444775287. The next prime is 1444775329. The reversal of 1444775320 is 235774441.

It is a super-2 number, since 2×1444775320² = 4174751450562204800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1444775320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444775329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18059652 + ... + 18059731.

It is an arithmetic number, because the mean of its divisors is an integer number (203171535).

Almost surely, 2^1444775320 is an apocalyptic number.

1444775320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1444775320 is an abundant number, since it is smaller than the sum of its proper divisors (1805969240).

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

1444775320 is a wasteful number, since it uses less digits than its factorization.

1444775320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36119394 (or 36119390 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 1444775320 is about 38010.2002099436. The cubic root of 1444775320 is about 1130.4901207461.

The spelling of 1444775320 in words is "one billion, four hundred forty-four million, seven hundred seventy-five thousand, three hundred twenty".