406589 has 4 divisors (see below), whose sum is σ = 430524. Its totient is φ = 382656.

The previous prime is 406583. The next prime is 406591. The reversal of 406589 is 985604.

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 284089 + 122500 = 533^2 + 350^2 .

It is a cyclic number.

It is not a de Polignac number, because 406589 - 2⁴ = 406573 is a prime.

It is a super-2 number, since 2×406589² = 330629229842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406589.

It is not an unprimeable number, because it can be changed into a prime (406583) 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, 11942 + ... + 11975.

It is an arithmetic number, because the mean of its divisors is an integer number (107631).

2⁴⁰⁶⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

406589 is a deficient number, since it is larger than the sum of its proper divisors (23935).

406589 is a wasteful number, since it uses less digits than its factorization.

406589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23934.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 406589 is about 637.6433172237. The cubic root of 406589 is about 74.0829967246.

The spelling of 406589 in words is "four hundred six thousand, five hundred eighty-nine".