1444639356 has 18 divisors (see below), whose sum is σ = 3651727352. Its totient is φ = 481546440.

The previous prime is 1444639307. The next prime is 1444639363. The reversal of 1444639356 is 6539364441.

1444639356 is a `hidden beast` number, since 1 + 4 + 4 + 4 + 639 + 3 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 20064400 + ... + 20064471.

Almost surely, 2^1444639356 is an apocalyptic number.

It is an amenable number.

1444639356 is an abundant number, since it is smaller than the sum of its proper divisors (2207087996).

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

1444639356 is a wasteful number, since it uses less digits than its factorization.

1444639356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40128881 (or 40128876 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The square root of 1444639356 is about 38008.4116479497. The cubic root of 1444639356 is about 1130.4546571510.

The spelling of 1444639356 in words is "one billion, four hundred forty-four million, six hundred thirty-nine thousand, three hundred fifty-six".