1444646880 has 192 divisors, whose sum is σ = 5088121920. Its totient is φ = 382814208.

The previous prime is 1444646857. The next prime is 1444646891. The reversal of 1444646880 is 886464441.

1444646880 is a `hidden beast` number, since 144 + 46 + 468 + 8 + 0 = 666.

1444646880 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 746394 + ... + 748326.

It is an arithmetic number, because the mean of its divisors is an integer number (26500635).

Almost surely, 2^1444646880 is an apocalyptic number.

1444646880 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 1444646880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2544060960).

1444646880 is an abundant number, since it is smaller than the sum of its proper divisors (3643475040).

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

1444646880 is a wasteful number, since it uses less digits than its factorization.

1444646880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130 (or 2116 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 45.

The square root of 1444646880 is about 38008.5106259111. The cubic root of 1444646880 is about 1130.4566196999.

The spelling of 1444646880 in words is "one billion, four hundred forty-four million, six hundred forty-six thousand, eight hundred eighty".