1444881897 has 12 divisors (see below), whose sum is σ = 2092313860. Its totient is φ = 960825888.

The previous prime is 1444881853. The next prime is 1444881899. The reversal of 1444881897 is 7981884441.

1444881897 is a `hidden beast` number, since 14 + 448 + 8 + 189 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 692531856 + 752350041 = 26316^2 + 27429^2 .

It is not a de Polignac number, because 1444881897 - 2⁷ = 1444881769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1444881899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198622 + ... + 205767.

Almost surely, 2^1444881897 is an apocalyptic number.

It is an amenable number.

1444881897 is a deficient number, since it is larger than the sum of its proper divisors (647431963).

1444881897 is a wasteful number, since it uses less digits than its factorization.

1444881897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404792 (or 404789 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The square root of 1444881897 is about 38011.6021367161. The cubic root of 1444881897 is about 1130.5179177517.

The spelling of 1444881897 in words is "one billion, four hundred forty-four million, eight hundred eighty-one thousand, eight hundred ninety-seven".