445144420 has 36 divisors (see below), whose sum is σ = 1087426620. Its totient is φ = 152620608.

The previous prime is 445144393. The next prime is 445144451. The reversal of 445144420 is 24441544.

445144420 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 2 ways, for example, as 314636644 + 130507776 = 17738^2 + 11424^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

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 11 ways as a sum of consecutive naturals, for example, 226135 + ... + 228094.

It is an arithmetic number, because the mean of its divisors is an integer number (30206295).

Almost surely, 2^445144420 is an apocalyptic number.

It is an amenable number.

445144420 is an abundant number, since it is smaller than the sum of its proper divisors (642282200).

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

445144420 is a wasteful number, since it uses less digits than its factorization.

445144420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454252 (or 454243 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 28.

The square root of 445144420 is about 21098.4459143322. The cubic root of 445144420 is about 763.5432542201.

Adding to 445144420 its reverse (24441544), we get a palindrome (469585964).

The spelling of 445144420 in words is "four hundred forty-five million, one hundred forty-four thousand, four hundred twenty".