1444743138 has 32 divisors (see below), whose sum is σ = 2910916800. Its totient is φ = 478022976.

The previous prime is 1444743121. The next prime is 1444743143. The reversal of 1444743138 is 8313474441.

It is a junction number, because it is equal to n+sod(n) for n = 1444743096 and 1444743105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511093 + ... + 513911.

It is an arithmetic number, because the mean of its divisors is an integer number (90966150).

Almost surely, 2^1444743138 is an apocalyptic number.

1444743138 is an abundant number, since it is smaller than the sum of its proper divisors (1466173662).

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

1444743138 is a wasteful number, since it uses less digits than its factorization.

1444743138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3426.

The product of its digits is 129024, while the sum is 39.

The square root of 1444743138 is about 38009.7768738518. The cubic root of 1444743138 is about 1130.4817268912.

The spelling of 1444743138 in words is "one billion, four hundred forty-four million, seven hundred forty-three thousand, one hundred thirty-eight".