445894820280 has 384 divisors, whose sum is σ = 1841118289920. Its totient is φ = 91043896320.

The previous prime is 445894820251. The next prime is 445894820281. The reversal of 445894820280 is 82028498544.

445894820280 is a `hidden beast` number, since 4 + 4 + 5 + 89 + 482 + 0 + 2 + 80 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445894820281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 796029 + ... + 1235091.

It is an arithmetic number, because the mean of its divisors is an integer number (4794578880).

Almost surely, 2^445894820280 is an apocalyptic number.

445894820280 is a gapful number since it is divisible by the number (40) 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 445894820280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (920559144960).

445894820280 is an abundant number, since it is smaller than the sum of its proper divisors (1395223469640).

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

445894820280 is a wasteful number, since it uses less digits than its factorization.

445894820280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439131 (or 439124 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 54.

The spelling of 445894820280 in words is "four hundred forty-five billion, eight hundred ninety-four million, eight hundred twenty thousand, two hundred eighty".