445643244 has 72 divisors (see below), whose sum is σ = 1164848048. Its totient is φ = 143544960.

The previous prime is 445643201. The next prime is 445643251. The reversal of 445643244 is 442346544.

445643244 is a `hidden beast` number, since 4 + 4 + 5 + 643 + 2 + 4 + 4 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 445643199 and 445643208.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 208059 + ... + 210189.

Almost surely, 2^445643244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 445643244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (582424024).

445643244 is an abundant number, since it is smaller than the sum of its proper divisors (719204804).

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

445643244 is a wasteful number, since it uses less digits than its factorization.

445643244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335 (or 2330 counting only the distinct ones).

The product of its digits is 184320, while the sum is 36.

The square root of 445643244 is about 21110.2639490841. The cubic root of 445643244 is about 763.8283538447.

Adding to 445643244 its reverse (442346544), we get a palindrome (887989788).

The spelling of 445643244 in words is "four hundred forty-five million, six hundred forty-three thousand, two hundred forty-four".