1444889040 has 320 divisors, whose sum is σ = 5416796160. Its totient is φ = 311592960.

The previous prime is 1444889027. The next prime is 1444889071. The reversal of 1444889040 is 409884441.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1444888983 and 1444889001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2289525 + ... + 2290155.

It is an arithmetic number, because the mean of its divisors is an integer number (16927488).

Almost surely, 2^1444889040 is an apocalyptic number.

1444889040 is a gapful number since it is divisible by the number (10) 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 1444889040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2708398080).

1444889040 is an abundant number, since it is smaller than the sum of its proper divisors (3971907120).

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

1444889040 is a wasteful number, since it uses less digits than its factorization.

1444889040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 1444889040 is about 38011.6960947548. The cubic root of 1444889040 is about 1130.5197807128.

The spelling of 1444889040 in words is "one billion, four hundred forty-four million, eight hundred eighty-nine thousand, forty".