1444721377 has 16 divisors (see below), whose sum is σ = 1629092160. Its totient is φ = 1269921600.

The previous prime is 1444721371. The next prime is 1444721413. The reversal of 1444721377 is 7731274441.

It is a cyclic number.

It is not a de Polignac number, because 1444721377 - 2⁷ = 1444721249 is a prime.

It is a super-2 number, since 2×1444721377² = 4174439714321552258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1444721371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21343 + ... + 57835.

It is an arithmetic number, because the mean of its divisors is an integer number (101818260).

Almost surely, 2^1444721377 is an apocalyptic number.

It is an amenable number.

1444721377 is a deficient number, since it is larger than the sum of its proper divisors (184370783).

1444721377 is a wasteful number, since it uses less digits than its factorization.

1444721377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36624.

The product of its digits is 131712, while the sum is 40.

The square root of 1444721377 is about 38009.4906174761. The cubic root of 1444721377 is about 1130.4760510180.

The spelling of 1444721377 in words is "one billion, four hundred forty-four million, seven hundred twenty-one thousand, three hundred seventy-seven".