285958 has 4 divisors (see below), whose sum is σ = 428940. Its totient is φ = 142978.

The previous prime is 285953. The next prime is 285977. The reversal of 285958 is 859582.

It is a happy number.

285958 is nontrivially palindromic in base 13.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 859582 = 2 ⋅429791.

It is a super-4 number, since 4×285958⁴ (a number of 23 digits) contains 4444 as substring.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71488 + ... + 71491.

It is an arithmetic number, because the mean of its divisors is an integer number (107235).

2²⁸⁵⁹⁵⁸ is an apocalyptic number.

285958 is a deficient number, since it is larger than the sum of its proper divisors (142982).

285958 is a wasteful number, since it uses less digits than its factorization.

285958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142981.

The product of its digits is 28800, while the sum is 37.

The square root of 285958 is about 534.7504090695. The cubic root of 285958 is about 65.8820974317.

The spelling of 285958 in words is "two hundred eighty-five thousand, nine hundred fifty-eight".