445721244 has 48 divisors (see below), whose sum is σ = 1057706496. Its totient is φ = 146059200.

The previous prime is 445721201. The next prime is 445721261. The reversal of 445721244 is 442127544.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 460449 + ... + 461415.

It is an arithmetic number, because the mean of its divisors is an integer number (22035552).

Almost surely, 2^445721244 is an apocalyptic number.

It is an amenable number.

445721244 is an abundant number, since it is smaller than the sum of its proper divisors (611985252).

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

445721244 is a wasteful number, since it uses less digits than its factorization.

445721244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586 (or 1584 counting only the distinct ones).

The product of its digits is 35840, while the sum is 33.

The square root of 445721244 is about 21112.1113108093. Note that the first 3 decimals coincide. The cubic root of 445721244 is about 763.8729150019.

Adding to 445721244 its reverse (442127544), we get a palindrome (887848788).

The spelling of 445721244 in words is "four hundred forty-five million, seven hundred twenty-one thousand, two hundred forty-four".