285433920 has 84 divisors (see below), whose sum is σ = 981783660. Its totient is φ = 76114944.

The previous prime is 285433919. The next prime is 285433931. The reversal of 285433920 is 29334582.

285433920 is a `hidden beast` number, since 28 + 543 + 3 + 92 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 163021824 + 122412096 = 12768^2 + 11064^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46675 + ... + 52434.

Almost surely, 2^285433920 is an apocalyptic number.

285433920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285433920 is an abundant number, since it is smaller than the sum of its proper divisors (696349740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285433920 is a wasteful number, since it uses less digits than its factorization.

285433920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99132 (or 99119 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 285433920 is about 16894.7897293811. The cubic root of 285433920 is about 658.4182507920.

The spelling of 285433920 in words is "two hundred eighty-five million, four hundred thirty-three thousand, nine hundred twenty".