285898 has 4 divisors (see below), whose sum is σ = 428850. Its totient is φ = 142948.

The previous prime is 285871. The next prime is 285937. The reversal of 285898 is 898582.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 243049 + 42849 = 493^2 + 207^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 285898.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71473 + ... + 71476.

2²⁸⁵⁸⁹⁸ is an apocalyptic number.

285898 is a deficient number, since it is larger than the sum of its proper divisors (142952).

285898 is a wasteful number, since it uses less digits than its factorization.

285898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142951.

The product of its digits is 46080, while the sum is 40.

The square root of 285898 is about 534.6943051876. The cubic root of 285898 is about 65.8774892931.

The spelling of 285898 in words is "two hundred eighty-five thousand, eight hundred ninety-eight".