285855949 has 4 divisors (see below), whose sum is σ = 286911040. Its totient is φ = 284800860.

The previous prime is 285855919. The next prime is 285855971. The reversal of 285855949 is 949558582.

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 285855949 - 2⁵ = 285855917 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 285855949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285855919) 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, 527139 + ... + 527680.

It is an arithmetic number, because the mean of its divisors is an integer number (71727760).

Almost surely, 2^285855949 is an apocalyptic number.

It is an amenable number.

285855949 is a deficient number, since it is larger than the sum of its proper divisors (1055091).

285855949 is a wasteful number, since it uses less digits than its factorization.

285855949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055090.

The product of its digits is 5184000, while the sum is 55.

The square root of 285855949 is about 16907.2750317726. The cubic root of 285855949 is about 658.7425929481.

The spelling of 285855949 in words is "two hundred eighty-five million, eight hundred fifty-five thousand, nine hundred forty-nine".