285728873 has 4 divisors (see below), whose sum is σ = 285762960. Its totient is φ = 285694788.

The previous prime is 285728867. The next prime is 285728879. The reversal of 285728873 is 378827582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (285728867) and next prime (285728879).

It is a cyclic number.

It is not a de Polignac number, because 285728873 - 2⁸ = 285728617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285728879) 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, 5258 + ... + 24476.

It is an arithmetic number, because the mean of its divisors is an integer number (71440740).

Almost surely, 2^285728873 is an apocalyptic number.

It is an amenable number.

285728873 is a deficient number, since it is larger than the sum of its proper divisors (34087).

285728873 is a wasteful number, since it uses less digits than its factorization.

285728873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34086.

The product of its digits is 1505280, while the sum is 50.

The square root of 285728873 is about 16903.5165867934. The cubic root of 285728873 is about 658.6449647762.

The spelling of 285728873 in words is "two hundred eighty-five million, seven hundred twenty-eight thousand, eight hundred seventy-three".