408845 has 4 divisors (see below), whose sum is σ = 490620. Its totient is φ = 327072.

The previous prime is 408841. The next prime is 408857. The reversal of 408845 is 548804.

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 98596 + 310249 = 314^2 + 557^2 .

It is a cyclic number.

It is not a de Polignac number, because 408845 - 2² = 408841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40880 + ... + 40889.

It is an arithmetic number, because the mean of its divisors is an integer number (122655).

2⁴⁰⁸⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

408845 is a deficient number, since it is larger than the sum of its proper divisors (81775).

408845 is an equidigital number, since it uses as much as digits as its factorization.

408845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81774.

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 408845 is about 639.4098841901. The cubic root of 408845 is about 74.2197630702.

The spelling of 408845 in words is "four hundred eight thousand, eight hundred forty-five".