285730043 has 4 divisors (see below), whose sum is σ = 285818760. Its totient is φ = 285641328.

The previous prime is 285730013. The next prime is 285730099. The reversal of 285730043 is 340037582.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340037582 = 2 ⋅170018791.

It is a cyclic number.

It is not a de Polignac number, because 285730043 - 2¹⁰ = 285729019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 285729991 and 285730009.

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, 39338 + ... + 46031.

It is an arithmetic number, because the mean of its divisors is an integer number (71454690).

Almost surely, 2^285730043 is an apocalyptic number.

285730043 is a deficient number, since it is larger than the sum of its proper divisors (88717).

285730043 is an equidigital number, since it uses as much as digits as its factorization.

285730043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88716.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 285730043 is about 16903.5511949413. The cubic root of 285730043 is about 658.6458637794.

The spelling of 285730043 in words is "two hundred eighty-five million, seven hundred thirty thousand, forty-three".