445904 has 30 divisors (see below), whose sum is σ = 923490. Its totient is φ = 208320.

The previous prime is 445891. The next prime is 445931. The reversal of 445904 is 409544.

It can be written as a sum of positive squares in only one way, i.e., 384400 + 61504 = 620^2 + 248^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14369 + ... + 14399.

It is an arithmetic number, because the mean of its divisors is an integer number (30783).

2⁴⁴⁵⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 445904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (461745).

445904 is an abundant number, since it is smaller than the sum of its proper divisors (477586).

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

445904 is a wasteful number, since it uses less digits than its factorization.

445904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 445904 is about 667.7604360847. The cubic root of 445904 is about 76.3977302579.

The spelling of 445904 in words is "four hundred forty-five thousand, nine hundred four".