285478384 has 20 divisors (see below), whose sum is σ = 568064584. Its totient is φ = 138881088.

The previous prime is 285478343. The next prime is 285478393. The reversal of 285478384 is 483874582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240522 + ... + 241705.

Almost surely, 2^285478384 is an apocalyptic number.

It is an amenable number.

285478384 is a deficient number, since it is larger than the sum of its proper divisors (282586200).

285478384 is a wasteful number, since it uses less digits than its factorization.

285478384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482272 (or 482266 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 49.

The square root of 285478384 is about 16896.1055867913. The cubic root of 285478384 is about 658.4524377929.

The spelling of 285478384 in words is "two hundred eighty-five million, four hundred seventy-eight thousand, three hundred eighty-four".