1444507389 has 36 divisors (see below), whose sum is σ = 2296543860. Its totient is φ = 874298880.

The previous prime is 1444507381. The next prime is 1444507399. The reversal of 1444507389 is 9837054441.

It can be written as a sum of positive squares in 6 ways, for example, as 680427225 + 764080164 = 26085^2 + 27642^2 .

It is not a de Polignac number, because 1444507389 - 2³ = 1444507381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444507381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 84997 + ... + 100565.

It is an arithmetic number, because the mean of its divisors is an integer number (63792885).

Almost surely, 2^1444507389 is an apocalyptic number.

It is an amenable number.

1444507389 is a deficient number, since it is larger than the sum of its proper divisors (852036471).

1444507389 is a wasteful number, since it uses less digits than its factorization.

1444507389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15662 (or 15646 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 1444507389 is about 38006.6755846917. The cubic root of 1444507389 is about 1130.4202339686.

The spelling of 1444507389 in words is "one billion, four hundred forty-four million, five hundred seven thousand, three hundred eighty-nine".