1447220880 has 720 divisors, whose sum is σ = 6351022080. Its totient is φ = 292626432.

The previous prime is 1447220821. The next prime is 1447220921. The reversal of 1447220880 is 880227441.

1447220880 is a `hidden beast` number, since 1 + 447 + 2 + 208 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 11395377 + ... + 11395503.

It is an arithmetic number, because the mean of its divisors is an integer number (8820864).

Almost surely, 2^1447220880 is an apocalyptic number.

1447220880 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 1447220880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3175511040).

1447220880 is an abundant number, since it is smaller than the sum of its proper divisors (4903801200).

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

1447220880 is a wasteful number, since it uses less digits than its factorization.

1447220880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 1447220880 is about 38042.3563938934. The cubic root of 1447220880 is about 1131.1276184775.

The spelling of 1447220880 in words is "one billion, four hundred forty-seven million, two hundred twenty thousand, eight hundred eighty".