285138153 has 12 divisors (see below), whose sum is σ = 429773760. Its totient is φ = 181827096.

The previous prime is 285138151. The next prime is 285138163. The reversal of 285138153 is 351831582.

It is not a de Polignac number, because 285138153 - 2¹ = 285138151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285138151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 688533 + ... + 688946.

It is an arithmetic number, because the mean of its divisors is an integer number (35814480).

Almost surely, 2^285138153 is an apocalyptic number.

285138153 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

285138153 is a deficient number, since it is larger than the sum of its proper divisors (144635607).

285138153 is a wasteful number, since it uses less digits than its factorization.

285138153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377508 (or 1377505 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 285138153 is about 16886.0342591148. The cubic root of 285138153 is about 658.1907542465.

The spelling of 285138153 in words is "two hundred eighty-five million, one hundred thirty-eight thousand, one hundred fifty-three".