290285 has 4 divisors (see below), whose sum is σ = 348348. Its totient is φ = 232224.

The previous prime is 290249. The next prime is 290317. The reversal of 290285 is 582092.

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 119716 + 170569 = 346^2 + 413^2 .

It is a cyclic number.

It is not a de Polignac number, because 290285 - 2¹⁴ = 273901 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29024 + ... + 29033.

It is an arithmetic number, because the mean of its divisors is an integer number (87087).

2²⁹⁰²⁸⁵ is an apocalyptic number.

It is an amenable number.

290285 is a deficient number, since it is larger than the sum of its proper divisors (58063).

290285 is an equidigital number, since it uses as much as digits as its factorization.

290285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58062.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 290285 is about 538.7810315889. The cubic root of 290285 is about 66.2127356591.

It can be divided in two parts, 290 and 285, that added together give a palindrome (575).

The spelling of 290285 in words is "two hundred ninety thousand, two hundred eighty-five".