445405140 has 72 divisors (see below), whose sum is σ = 1384037928. Its totient is φ = 115875840.

The previous prime is 445405139. The next prime is 445405159. The reversal of 445405140 is 41504544.

It can be written as a sum of positive squares in 4 ways, for example, as 24088464 + 421316676 = 4908^2 + 20526^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22797 + ... + 37556.

It is an arithmetic number, because the mean of its divisors is an integer number (19222749).

Almost surely, 2^445405140 is an apocalyptic number.

It is an amenable number.

445405140 is an abundant number, since it is smaller than the sum of its proper divisors (938632788).

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

445405140 is a wasteful number, since it uses less digits than its factorization.

445405140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60409 (or 60404 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 445405140 is about 21104.6236640221. The cubic root of 445405140 is about 763.6922935999.

Adding to 445405140 its reverse (41504544), we get a palindrome (486909684).

The spelling of 445405140 in words is "four hundred forty-five million, four hundred five thousand, one hundred forty".