285481009 has 8 divisors (see below), whose sum is σ = 311660352. Its totient is φ = 259339440.

The previous prime is 285481003. The next prime is 285481019. The reversal of 285481009 is 900184582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285481009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285481003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7732 + ... + 25114.

It is an arithmetic number, because the mean of its divisors is an integer number (38957544).

Almost surely, 2^285481009 is an apocalyptic number.

It is an amenable number.

285481009 is a deficient number, since it is larger than the sum of its proper divisors (26179343).

285481009 is a wasteful number, since it uses less digits than its factorization.

285481009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18887.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 285481009 is about 16896.1832672352. The cubic root of 285481009 is about 658.4544559636.

The spelling of 285481009 in words is "two hundred eighty-five million, four hundred eighty-one thousand, nine".