445345020 has 96 divisors (see below), whose sum is σ = 1391342400. Its totient is φ = 118259712.

The previous prime is 445345007. The next prime is 445345027. The reversal of 445345020 is 20543544.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445345027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137176 + ... + 140384.

It is an arithmetic number, because the mean of its divisors is an integer number (14493150).

Almost surely, 2^445345020 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 445345020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (695671200).

445345020 is an abundant number, since it is smaller than the sum of its proper divisors (945997380).

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

445345020 is a wasteful number, since it uses less digits than its factorization.

445345020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3484 (or 3476 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 445345020 is about 21103.1992835210. The cubic root of 445345020 is about 763.6579314409.

Adding to 445345020 its reverse (20543544), we get a palindrome (465888564).

The spelling of 445345020 in words is "four hundred forty-five million, three hundred forty-five thousand, twenty".