408945 has 16 divisors (see below), whose sum is σ = 662400. Its totient is φ = 215424.

The previous prime is 408943. The next prime is 408953. The reversal of 408945 is 549804.

It is not a de Polignac number, because 408945 - 2¹ = 408943 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (408943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1956 + ... + 2154.

It is an arithmetic number, because the mean of its divisors is an integer number (41400).

2⁴⁰⁸⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

408945 is a deficient number, since it is larger than the sum of its proper divisors (253455).

408945 is a wasteful number, since it uses less digits than its factorization.

408945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 408945 is about 639.4880765112. The cubic root of 408945 is about 74.2258137506.

The spelling of 408945 in words is "four hundred eight thousand, nine hundred forty-five".