445300644 has 48 divisors (see below), whose sum is σ = 1106945280. Its totient is φ = 138921120.

The previous prime is 445300579. The next prime is 445300649. The reversal of 445300644 is 446003544.

It is a super-3 number, since 3×445300644³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (445300649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7159 + ... + 30689.

It is an arithmetic number, because the mean of its divisors is an integer number (23061360).

Almost surely, 2^445300644 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 445300644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (553472640).

445300644 is an abundant number, since it is smaller than the sum of its proper divisors (661644636).

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

445300644 is a wasteful number, since it uses less digits than its factorization.

445300644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23640 (or 23638 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 445300644 is about 21102.1478527661. The cubic root of 445300644 is about 763.6325659314.

The spelling of 445300644 in words is "four hundred forty-five million, three hundred thousand, six hundred forty-four".