285402 has 16 divisors (see below), whose sum is σ = 614880. Its totient is φ = 87792.

The previous prime is 285377. The next prime is 285421. The reversal of 285402 is 204582.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285402.

It is an unprimeable number.

285402 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1752 + ... + 1907.

It is an arithmetic number, because the mean of its divisors is an integer number (38430).

2²⁸⁵⁴⁰² is an apocalyptic number.

285402 is an abundant number, since it is smaller than the sum of its proper divisors (329478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285402 is a wasteful number, since it uses less digits than its factorization.

285402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3677.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 285402 is about 534.2302874229. The cubic root of 285402 is about 65.8393706297.

Adding to 285402 its reverse (204582), we get a palindrome (489984).

The spelling of 285402 in words is "two hundred eighty-five thousand, four hundred two".