285398 has 4 divisors (see below), whose sum is σ = 428100. Its totient is φ = 142698.

The previous prime is 285377. The next prime is 285421. The reversal of 285398 is 893582.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285398.

It is an unprimeable number.

285398 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 as a sum of consecutive naturals, namely, 71348 + ... + 71351.

It is an arithmetic number, because the mean of its divisors is an integer number (107025).

2²⁸⁵³⁹⁸ is an apocalyptic number.

285398 is a deficient number, since it is larger than the sum of its proper divisors (142702).

285398 is a wasteful number, since it uses less digits than its factorization.

285398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142701.

The product of its digits is 17280, while the sum is 35.

The square root of 285398 is about 534.2265437059. The cubic root of 285398 is about 65.8390630417.

The spelling of 285398 in words is "two hundred eighty-five thousand, three hundred ninety-eight".