285774889 has 4 divisors (see below), whose sum is σ = 286160256. Its totient is φ = 285389524.

The previous prime is 285774869. The next prime is 285774911. The reversal of 285774889 is 988477582.

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.

It is a cyclic number.

It is not a de Polignac number, because 285774889 - 2⁵ = 285774857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285774809) 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, 191569 + ... + 193054.

It is an arithmetic number, because the mean of its divisors is an integer number (71540064).

Almost surely, 2^285774889 is an apocalyptic number.

It is an amenable number.

285774889 is a deficient number, since it is larger than the sum of its proper divisors (385367).

285774889 is an equidigital number, since it uses as much as digits as its factorization.

285774889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385366.

The product of its digits is 9031680, while the sum is 58.

The square root of 285774889 is about 16904.8776688860. The cubic root of 285774889 is about 658.6803206475.

The spelling of 285774889 in words is "two hundred eighty-five million, seven hundred seventy-four thousand, eight hundred eighty-nine".