285984478 has 16 divisors (see below), whose sum is σ = 464816016. Its totient is φ = 131181120.

The previous prime is 285984473. The next prime is 285984481. The reversal of 285984478 is 874489582.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285984473) 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, 29503 + ... + 37978.

It is an arithmetic number, because the mean of its divisors is an integer number (29051001).

Almost surely, 2^285984478 is an apocalyptic number.

285984478 is a deficient number, since it is larger than the sum of its proper divisors (178831538).

285984478 is a wasteful number, since it uses less digits than its factorization.

285984478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67659.

The product of its digits is 5160960, while the sum is 55.

The square root of 285984478 is about 16911.0756015104. The cubic root of 285984478 is about 658.8413079833.

The spelling of 285984478 in words is "two hundred eighty-five million, nine hundred eighty-four thousand, four hundred seventy-eight".