285038887 has 4 divisors (see below), whose sum is σ = 325758736. Its totient is φ = 244319040.

The previous prime is 285038869. The next prime is 285038903. The reversal of 285038887 is 788830582.

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

It is not a de Polignac number, because 285038887 - 2¹¹ = 285036839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 285038887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285038827) 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, 20359914 + ... + 20359927.

It is an arithmetic number, because the mean of its divisors is an integer number (81439684).

Almost surely, 2^285038887 is an apocalyptic number.

285038887 is a deficient number, since it is larger than the sum of its proper divisors (40719849).

285038887 is an equidigital number, since it uses as much as digits as its factorization.

285038887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40719848.

The product of its (nonzero) digits is 860160, while the sum is 49.

The square root of 285038887 is about 16883.0947103900. The cubic root of 285038887 is about 658.1143660746.

The spelling of 285038887 in words is "two hundred eighty-five million, thirty-eight thousand, eight hundred eighty-seven".