402589 has 4 divisors (see below), whose sum is σ = 439200. Its totient is φ = 365980.

The previous prime is 402587. The next prime is 402593. The reversal of 402589 is 985204.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 402589 - 2¹ = 402587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402581) 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, 18289 + ... + 18310.

It is an arithmetic number, because the mean of its divisors is an integer number (109800).

2⁴⁰²⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

402589 is a deficient number, since it is larger than the sum of its proper divisors (36611).

402589 is a wasteful number, since it uses less digits than its factorization.

402589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36610.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 402589 is about 634.4990149717. The cubic root of 402589 is about 73.8392541909.

It can be divided in two parts, 4025 and 89, that added together give a palindrome (4114).

The spelling of 402589 in words is "four hundred two thousand, five hundred eighty-nine".