445040020 has 12 divisors (see below), whose sum is σ = 934584084. Its totient is φ = 178016000.

The previous prime is 445040017. The next prime is 445040023. The reversal of 445040020 is 20040544.

It is an interprime number because it is at equal distance from previous prime (445040017) and next prime (445040023).

It can be written as a sum of positive squares in 2 ways, for example, as 138579984 + 306460036 = 11772^2 + 17506^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 445040020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445040023) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11125981 + ... + 11126020.

It is an arithmetic number, because the mean of its divisors is an integer number (77882007).

Almost surely, 2^445040020 is an apocalyptic number.

It is an amenable number.

445040020 is an abundant number, since it is smaller than the sum of its proper divisors (489544064).

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

445040020 is a wasteful number, since it uses less digits than its factorization.

445040020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22252010 (or 22252008 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 445040020 is about 21095.9716533750. The cubic root of 445040020 is about 763.4835581269.

Adding to 445040020 its reverse (20040544), we get a palindrome (465080564).

The spelling of 445040020 in words is "four hundred forty-five million, forty thousand, twenty".