285788255 has 4 divisors (see below), whose sum is σ = 342945912. Its totient is φ = 228630600.

The previous prime is 285788249. The next prime is 285788257. The reversal of 285788255 is 552887582.

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

It is not a de Polignac number, because 285788255 - 2²² = 281593951 is a prime.

It is a super-3 number, since 3×285788255³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285788257) 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, 28578821 + ... + 28578830.

It is an arithmetic number, because the mean of its divisors is an integer number (85736478).

Almost surely, 2^285788255 is an apocalyptic number.

285788255 is a deficient number, since it is larger than the sum of its proper divisors (57157657).

285788255 is an equidigital number, since it uses as much as digits as its factorization.

285788255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57157656.

The product of its digits is 1792000, while the sum is 50.

The square root of 285788255 is about 16905.2729939507. The cubic root of 285788255 is about 658.6905895506.

The spelling of 285788255 in words is "two hundred eighty-five million, seven hundred eighty-eight thousand, two hundred fifty-five".