285128365 has 8 divisors (see below), whose sum is σ = 343189728. Its totient is φ = 227412240.

The previous prime is 285128341. The next prime is 285128381. The reversal of 285128365 is 563821582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 285128365 - 2⁷ = 285128237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84487 + ... + 87796.

It is an arithmetic number, because the mean of its divisors is an integer number (42898716).

Almost surely, 2^285128365 is an apocalyptic number.

It is an amenable number.

285128365 is a deficient number, since it is larger than the sum of its proper divisors (58061363).

285128365 is a wasteful number, since it uses less digits than its factorization.

285128365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172619.

The product of its digits is 115200, while the sum is 40.

The square root of 285128365 is about 16885.7444313243. The cubic root of 285128365 is about 658.1832228741.

The spelling of 285128365 in words is "two hundred eighty-five million, one hundred twenty-eight thousand, three hundred sixty-five".