408445 has 4 divisors (see below), whose sum is σ = 490140. Its totient is φ = 326752.

The previous prime is 408437. The next prime is 408461. The reversal of 408445 is 544804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 276676 + 131769 = 526^2 + 363^2 .

It is a cyclic number.

It is not a de Polignac number, because 408445 - 2³ = 408437 is a prime.

It is an Ulam number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 40840 + ... + 40849.

It is an arithmetic number, because the mean of its divisors is an integer number (122535).

2⁴⁰⁸⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

408445 is a deficient number, since it is larger than the sum of its proper divisors (81695).

408445 is an equidigital number, since it uses as much as digits as its factorization.

408445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81694.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 408445 is about 639.0970192389. The cubic root of 408445 is about 74.1955504775.

The spelling of 408445 in words is "four hundred eight thousand, four hundred forty-five".