1444641408 has 192 divisors, whose sum is σ = 4958179200. Its totient is φ = 394758144.

The previous prime is 1444641391. The next prime is 1444641433. The reversal of 1444641408 is 8041464441.

1444641408 is a `hidden beast` number, since 1 + 4 + 4 + 4 + 641 + 4 + 0 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 181578 + ... + 189366.

It is an arithmetic number, because the mean of its divisors is an integer number (25823850).

Almost surely, 2^1444641408 is an apocalyptic number.

1444641408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1444641408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2479089600).

1444641408 is an abundant number, since it is smaller than the sum of its proper divisors (3513537792).

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

1444641408 is a wasteful number, since it uses less digits than its factorization.

1444641408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7839 (or 7824 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The square root of 1444641408 is about 38008.4386419648. The cubic root of 1444641408 is about 1130.4551923923.

The spelling of 1444641408 in words is "one billion, four hundred forty-four million, six hundred forty-one thousand, four hundred eight".