285104 has 20 divisors (see below), whose sum is σ = 560976. Its totient is φ = 140352.

The previous prime is 285101. The next prime is 285113. The reversal of 285104 is 401582.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285104.

It is not an unprimeable number, because it can be changed into a prime (285101) 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, 1562 + ... + 1734.

2²⁸⁵¹⁰⁴ is an apocalyptic number.

It is an amenable number.

285104 is a deficient number, since it is larger than the sum of its proper divisors (275872).

285104 is a wasteful number, since it uses less digits than its factorization.

285104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 285104 is about 533.9513086415. The cubic root of 285104 is about 65.8164474487.

Adding to 285104 its reverse (401582), we get a palindrome (686686).

The spelling of 285104 in words is "two hundred eighty-five thousand, one hundred four".