406089 has 6 divisors (see below), whose sum is σ = 586586. Its totient is φ = 270720.

The previous prime is 406073. The next prime is 406093. The reversal of 406089 is 980604.

It can be written as a sum of positive squares in only one way, i.e., 242064 + 164025 = 492^2 + 405^2 .

It is not a de Polignac number, because 406089 - 2⁴ = 406073 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (406789) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22552 + ... + 22569.

2⁴⁰⁶⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

406089 is a deficient number, since it is larger than the sum of its proper divisors (180497).

406089 is a wasteful number, since it uses less digits than its factorization.

406089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45127 (or 45124 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 406089 is about 637.2511278923. The cubic root of 406089 is about 74.0526165843.

The spelling of 406089 in words is "four hundred six thousand, eighty-nine".