285730033 has 4 divisors (see below), whose sum is σ = 302537700. Its totient is φ = 268922368.

The previous prime is 285730013. The next prime is 285730099. The reversal of 285730033 is 330037582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 166745569 + 118984464 = 12913^2 + 10908^2 .

It is a cyclic number.

It is not a de Polignac number, because 285730033 - 2⁵ = 285730001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 285729977 and 285730004.

It is not an unprimeable number, because it can be changed into a prime (285730013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8403808 + ... + 8403841.

It is an arithmetic number, because the mean of its divisors is an integer number (75634425).

Almost surely, 2^285730033 is an apocalyptic number.

It is an amenable number.

285730033 is a deficient number, since it is larger than the sum of its proper divisors (16807667).

285730033 is a wasteful number, since it uses less digits than its factorization.

285730033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16807666.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 285730033 is about 16903.5508991454. The cubic root of 285730033 is about 658.6458560956.

The spelling of 285730033 in words is "two hundred eighty-five million, seven hundred thirty thousand, thirty-three".