285148871 has 16 divisors (see below), whose sum is σ = 360059904. Its totient is φ = 220032384.

The previous prime is 285148861. The next prime is 285148883. The reversal of 285148871 is 178841582.

It is a cyclic number.

It is not a de Polignac number, because 285148871 - 2²² = 280954567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285148861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49355 + ... + 54828.

It is an arithmetic number, because the mean of its divisors is an integer number (22503744).

Almost surely, 2^285148871 is an apocalyptic number.

285148871 is a deficient number, since it is larger than the sum of its proper divisors (74911033).

285148871 is a wasteful number, since it uses less digits than its factorization.

285148871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104230.

The product of its digits is 143360, while the sum is 44.

The square root of 285148871 is about 16886.3516189851. The cubic root of 285148871 is about 658.1990010093.

The spelling of 285148871 in words is "two hundred eighty-five million, one hundred forty-eight thousand, eight hundred seventy-one".