445805 has 8 divisors (see below), whose sum is σ = 539232. Its totient is φ = 353808.

The previous prime is 445799. The next prime is 445807. The reversal of 445805 is 508544.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 445805 - 2⁴ = 445789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 542 + ... + 1088.

It is an arithmetic number, because the mean of its divisors is an integer number (67404).

2⁴⁴⁵⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

445805 is a deficient number, since it is larger than the sum of its proper divisors (93427).

445805 is a wasteful number, since it uses less digits than its factorization.

445805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 445805 is about 667.6863035887. The cubic root of 445805 is about 76.3920758756.

The spelling of 445805 in words is "four hundred forty-five thousand, eight hundred five".