445040 has 20 divisors (see below), whose sum is σ = 1034904. Its totient is φ = 177984.

The previous prime is 445033. The next prime is 445069. The reversal of 445040 is 40544.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

445040 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2702 + ... + 2861.

2⁴⁴⁵⁰⁴⁰ is an apocalyptic number.

445040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

445040 is an abundant number, since it is smaller than the sum of its proper divisors (589864).

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

445040 is a wasteful number, since it uses less digits than its factorization.

445040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5576 (or 5570 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 445040 is about 667.1131838002. The cubic root of 445040 is about 76.3483546690.

Adding to 445040 its reverse (40544), we get a palindrome (485584).

Subtracting from 445040 its reverse (40544), we obtain a square (404496 = 636²).

The spelling of 445040 in words is "four hundred forty-five thousand, forty".