285148643 has 8 divisors (see below), whose sum is σ = 307465200. Its totient is φ = 262886688.

The previous prime is 285148627. The next prime is 285148673. The reversal of 285148643 is 346841582.

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

It is a cyclic number.

It is not a de Polignac number, because 285148643 - 2⁴ = 285148627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 285148643.

It is not an unprimeable number, because it can be changed into a prime (285148673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2453 + ... + 24006.

It is an arithmetic number, because the mean of its divisors is an integer number (38433150).

Almost surely, 2^285148643 is an apocalyptic number.

285148643 is a deficient number, since it is larger than the sum of its proper divisors (22316557).

285148643 is a wasteful number, since it uses less digits than its factorization.

285148643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27301.

The product of its digits is 184320, while the sum is 41.

The square root of 285148643 is about 16886.3448679695. The cubic root of 285148643 is about 658.1988255811.

The spelling of 285148643 in words is "two hundred eighty-five million, one hundred forty-eight thousand, six hundred forty-three".