283405 has 4 divisors (see below), whose sum is σ = 340092. Its totient is φ = 226720.

The previous prime is 283403. The next prime is 283411. The reversal of 283405 is 504382.

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 121801 + 161604 = 349^2 + 402^2 .

It is not a de Polignac number, because 283405 - 2¹ = 283403 is a prime.

It is a Duffinian number.

283405 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (283403) 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, 28336 + ... + 28345.

It is an arithmetic number, because the mean of its divisors is an integer number (85023).

2²⁸³⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

283405 is a deficient number, since it is larger than the sum of its proper divisors (56687).

283405 is an equidigital number, since it uses as much as digits as its factorization.

283405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56686.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 283405 is about 532.3579622773. The cubic root of 283405 is about 65.6854484599.

Adding to 283405 its reverse (504382), we get a palindrome (787787).

The spelling of 283405 in words is "two hundred eighty-three thousand, four hundred five".