1444738538 has 16 divisors (see below), whose sum is σ = 2204252160. Its totient is φ = 710092656.

The previous prime is 1444738507. The next prime is 1444738571. The reversal of 1444738538 is 8358374441.

It is a junction number, because it is equal to n+sod(n) for n = 1444738492 and 1444738501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1595 + ... + 53777.

It is an arithmetic number, because the mean of its divisors is an integer number (137765760).

Almost surely, 2^1444738538 is an apocalyptic number.

1444738538 is a deficient number, since it is larger than the sum of its proper divisors (759513622).

1444738538 is a wasteful number, since it uses less digits than its factorization.

1444738538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52421.

The product of its digits is 1290240, while the sum is 47.

The square root of 1444738538 is about 38009.7163630564. The cubic root of 1444738538 is about 1130.4805270882.

The spelling of 1444738538 in words is "one billion, four hundred forty-four million, seven hundred thirty-eight thousand, five hundred thirty-eight".