447321898782 has 96 divisors (see below), whose sum is σ = 1075673813760. Its totient is φ = 133199199360.

The previous prime is 447321898781. The next prime is 447321898787. The reversal of 447321898782 is 287898123744.

447321898782 is a `hidden beast` number, since 4 + 473 + 2 + 1 + 8 + 9 + 87 + 82 = 666.

It is a super-2 number, since 2×447321898782² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447321898781) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34490463 + ... + 34503429.

It is an arithmetic number, because the mean of its divisors is an integer number (11204935560).

Almost surely, 2^447321898782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 447321898782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (537836906880).

447321898782 is an abundant number, since it is smaller than the sum of its proper divisors (628351914978).

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

447321898782 is a wasteful number, since it uses less digits than its factorization.

447321898782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15998 (or 15995 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 63.

The spelling of 447321898782 in words is "four hundred forty-seven billion, three hundred twenty-one million, eight hundred ninety-eight thousand, seven hundred eighty-two".