285403875 has 32 divisors (see below), whose sum is σ = 477295104. Its totient is φ = 151452000.

The previous prime is 285403873. The next prime is 285403879. The reversal of 285403875 is 578304582.

It is not a de Polignac number, because 285403875 - 2¹ = 285403873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285403873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77322 + ... + 80928.

It is an arithmetic number, because the mean of its divisors is an integer number (14915472).

Almost surely, 2^285403875 is an apocalyptic number.

285403875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

285403875 is a deficient number, since it is larger than the sum of its proper divisors (191891229).

285403875 is a wasteful number, since it uses less digits than its factorization.

285403875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3836 (or 3826 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 42.

The square root of 285403875 is about 16893.9005265214. The cubic root of 285403875 is about 658.3951481062.

The spelling of 285403875 in words is "two hundred eighty-five million, four hundred three thousand, eight hundred seventy-five".